Know why not try downloading a launcher ?, often TouchWiz launcher is very cumbersome and slow, Google Play can find many launcher ... I would recommend Nova Launcher or Smart Launcher are two very very light, if not solve the problem so you can try to enter:
- Configuration
- Application Manager
- You shift where it says "All"
- Looking for Home TouchWiz choose, forced detention, clear cache and then delete data ...
But you could try a Wipe Cache from the recovery, but usually is solved with the first thing I said ...
luck :)