README.md in snapshot-0.4.11 vs README.md in snapshot-0.4.12

@@ -299,9 +299,17 @@
 
 ```ruby
 clear_previous_screenshots
 ```
 
+### Completely reset all simulators
+
+    snapshot reset_simulators
+
+**Warning**: This will delete **all** your simulators and replace by new ones! This is useful, if you run into weird `Instruments` problems when running `snapshot`. 
+
+You can use the environment variable `SNAPSHOT_FORCE_DELETE` to stop asking for confirmation before deleting.
+
 
 # Tips
 
 ## [`fastlane`](http://fastlane.tools) Toolchain