Fix lingering timer in generic_hygrostat (#92575)

homeassistant/components/generic_hygrostat/humidifier.py

@@ -172,7 +172,11 @@ class GenericHygrostat(HumidifierEntity, RestoreEntity):
         )
 
         if self._keep_alive:
-            async_track_time_interval(self.hass, self._async_operate, self._keep_alive)
+            self.async_on_remove(
+                async_track_time_interval(
+                    self.hass, self._async_operate, self._keep_alive
+                )
+            )
 
         async def _async_startup(event):
             """Init on startup."""
@@ -216,6 +220,12 @@ class GenericHygrostat(HumidifierEntity, RestoreEntity):
 
         await _async_startup(None)  # init the sensor
 
+    async def async_will_remove_from_hass(self) -> None:
+        """Run when entity will be removed from hass."""
+        if self._remove_stale_tracking:
+            self._remove_stale_tracking()
+        return await super().async_will_remove_from_hass()
+
     @property
     def available(self):
         """Return True if entity is available."""