diff --git a/gaze/ft-gazed b/gaze/ft-gazed
index 1914440..93aa877 100755
--- a/gaze/ft-gazed
+++ b/gaze/ft-gazed
@@ -10,9 +10,10 @@ again when the file changes:
                            grabber, and ft-eyes' Python in this checkout), else SteamVR's; it
                            switches when ours is installed or removed.
   GAZE_EYE=auto|left|right the eye bias (gazecal.EyeWeights): auto weights each eye by how far
-                           off it was at your recent nudges; left or right counts that eye twice
-                           as much as the other. Either eye alone carries the gaze when the
-                           other isn't seen.
+                           off it was at your recent nudges (since our tracker's last
+                           calibration: a new one starts them over); left or right counts that
+                           eye twice as much as the other. Either eye alone carries the gaze
+                           when the other isn't seen.
   GAZE_FUSION=off|on       with our tracker: SteamVR's gaze too (gazecal.Fusion, fusion.json).
                            SteamVR's two eyes' mean, corrected by an affine fitted at our
                            calibration's dots, is mixed half and half with ours where both our
@@ -272,6 +273,7 @@ class Service:
         self.cal_mtime = None
         self.lives = {name: PointerLessons() for name in SOURCES}
         self.weights = {t: EyeWeights(self.bias) for t in TRACKERS}
+        self.own_made = None  # when our tracker's calibration was made, as its misses knew it
         self.dirty = False
         self.fusion_on = read_fusion()
         self.fusion, self.fusion_mtime = None, None
@@ -437,12 +439,14 @@ class Service:
         for t, misses in (d.get("misses") or {}).items():
             if t in self.weights:
                 self.weights[t] = EyeWeights(self.bias, misses)
+        self.own_made = d.get("own_made")
         log(", ".join(f"{n} {len(self.lives[n].samples)}" for n in (self.source,) + SIDES) + " lessons")
 
     def save_lessons(self):
         tmp = LESSONS.with_suffix(".tmp")
         tmp.write_text(json.dumps({"version": 2, "sources": {n: lv.samples for n, lv in self.lives.items() if lv.samples},
-                                   "misses": {t: w.misses for t, w in self.weights.items()}}))
+                                   "misses": {t: w.misses for t, w in self.weights.items()},
+                                   "own_made": self.own_made}))
         tmp.replace(LESSONS)
         self.dirty = False
 
@@ -996,9 +1000,29 @@ class Service:
                     self.own, self.own_at = json.loads(data), time.monotonic()
                 except ValueError:
                     pass
+                else:
+                    self.note_own_calibration()
             else:
                 log(f"our tracker: {data}")
 
+    def note_own_calibration(self):
+        """Our tracker's status names a calibration other than the one its eye misses were
+        measured on: they start over, and the eyes count alike until each has EyeWeights.MIN
+        again. The misses say how far each eye's old mapping was off, and a new calibration
+        replaces both mappings (it can drop an eye, or be someone else's). Live 2026-10-18 a
+        calibration's own dots fed the right eye misses of the right-only one before it, and the
+        balance after it was that one's. Whatever made the calibration: the panel, the probe."""
+        made = (self.own.get("calibration") or {}).get("made")
+        if not made or made == self.own_made:
+            return
+        w = self.weights["own"]
+        if self.own_made is not None and any(w.misses):
+            log(f"our tracker's calibration from {made}: the eye weights start over "
+                f"(were {', '.join(f'{v:.2f}' for v in w.weights())} from {', '.join(str(len(m)) for m in w.misses)} misses)")
+            self.weights["own"] = EyeWeights(self.bias)
+        self.own_made = made
+        self.dirty = True
+
     def status(self):
         kind = self.kind
         tracker = "own" if kind == "own" else "steam"
diff --git a/gaze/gazecal.py b/gaze/gazecal.py
index 3721f42..29557e7 100644
--- a/gaze/gazecal.py
+++ b/gaze/gazecal.py
@@ -675,7 +675,10 @@ class EyeWeights:
     alike until then. Each miss is measured before its lesson teaches anything, so each is a
     fresh test. On SteamVR's own test (2026-09-29) its calibration dots said the left eye was
     the better one and new spots said the right, so the misses come from lessons, not the fit.
-    An eye that isn't seen (None) drops out, and the other carries the gaze alone."""
+    An eye that isn't seen (None) drops out, and the other carries the gaze alone. Our
+    tracker's start over with each new calibration of it (ft-gazed's note_own_calibration).
+    Not from the new fit's per-eye spread: on 2026-10-18's replays (frame-eyes
+    one_eye_replay.py) spread and equal weights came out the same, 2.29 degrees median."""
 
     LEAN = 2.0
     KEEP = 20
diff --git a/gaze/test/one-eye-calibration-test.py b/gaze/test/one-eye-calibration-test.py
index 776db2f..53beba3 100644
--- a/gaze/test/one-eye-calibration-test.py
+++ b/gaze/test/one-eye-calibration-test.py
@@ -206,6 +206,49 @@ check("ft-gazed, our tracker: both eyes, then the left lost: no jump",
       (svc.sent[-2], abs(svc.sent[-1][0] - 5.0) < 0.05), ((5.0, 2.0), True))
 check("...counted as one eye", svc.counts["one_eye"], 1)
 
+
+# --- a new calibration starts the eye weights over (ft-gazed's note_own_calibration) ---
+logs = []
+gazed.log = lambda msg: logs.append(msg)
+svc = service()
+svc.bias, svc.own_made, svc.dirty = "auto", None, False
+svc.own = {"calibration": {"made": "2026-10-18 20:58:26", "dots": 27}}
+svc.note_own_calibration()
+check("the first calibration it hears of: adopted, nothing dropped", (svc.own_made, logs), ("2026-10-18 20:58:26", []))
+for _ in range(6):
+    svc.weights["own"].add([2.0, 0.5])   # the left eye's mapping was the worse one
+before = svc.weights["own"].weights()
+check("misses on that calibration lean toward the right eye", before[1] > 0.9, True)
+svc.note_own_calibration()
+check("the same calibration again: kept", svc.weights["own"].weights(), before)
+svc.own = {"calibration": {"made": "2026-10-18 21:11:33", "dots": 26}}
+svc.note_own_calibration()
+check("a new calibration: the misses start over", svc.weights["own"].misses, [[], []])
+check("...the eyes count alike until each has MIN again", tuple(svc.weights["own"].weights()), (0.5, 0.5))
+check("...said in the log", sum("eye weights start over" in m for m in logs), 1)
+check("...and saved with the stamp", (svc.own_made, svc.dirty), ("2026-10-18 21:11:33", True))
+svc.own = {}
+svc.note_own_calibration()
+check("a status without a calibration changes nothing", svc.own_made, "2026-10-18 21:11:33")
+
+# The stamp lives with the misses, so a restart keeps them and a calibration made meanwhile doesn't.
+svc.lives = {name: gazed.PointerLessons() for name in gazed.SOURCES}
+svc.weights["own"].add([1.0, 1.0])
+gazed.STATE.mkdir(parents=True, exist_ok=True)
+svc.save_lessons()
+again = service()
+again.bias, again.lives = "auto", {name: gazed.PointerLessons() for name in gazed.SOURCES}
+again.source = "mmap1"
+again.load_lessons()
+check("after a restart: the stamp and the misses", (again.own_made, again.weights["own"].misses),
+      ("2026-10-18 21:11:33", [[1.0], [1.0]]))
+again.own = {"calibration": {"made": "2026-10-18 21:11:33"}}
+again.note_own_calibration()
+check("...the same calibration: kept", again.weights["own"].misses, [[1.0], [1.0]])
+again.own = {"calibration": {"made": "2026-10-18 21:30:00"}}
+again.note_own_calibration()
+check("...one made while it was down: started over", again.weights["own"].misses, [[], []])
+
 shutil.rmtree(HOME, ignore_errors=True)
 print("FAILED: " + ", ".join(failures) if failures else "all passed", flush=True)
 sys.exit(1 if failures else 0)