66:99 and climbing:

Yes, there is a better way than going into every single simulator in town, and resetting contents and settings one at a time. Also much better than looking into your simulator’s directory and yanking the cache from under its feet.

Quit iPhone Simulator, then run xcrun in Terminal:

xcrun simctl erase all

Safe and effective.

See https://stackoverflow.com/a/26394597/218152 for single device

xcrun simctl erase [device ID]