My device has been running slow since the last software update. How do I fix it?

Question

Ever since the last software update about 7-10 days ago, my Galaxy 4S has been slow, unresponsive at times and the swipe to open feature won't work.  Any ideas?

I took the phone by the Verizon Store and the guy there said my phone was wet and I needed a new one.

It had not gotten wet!!!!!!!!!!

Snn5 · Accepted Answer

I'd recommend a system cache clear first:

Turn off phone

Remove the battery and reinsert.

Hold down the Home and Volume Up keys

Press and hold the Power button while still holding the other keys.

As soon as you see the Samsung logo, release all keys/buttons.

Press on the Volume Down to scroll down to Wipe Cache Partition.

Press the Power button to select it.

Press the Volume down button to highlight "Yes" and press the Power Button to select it.

Wait for a few minutes for the phone to clear the data.

Then press the Power button to select reboot system now.

Wait for your phone to reboot.

If that doesn't work:

Perform a Factory Data Reset (Device Powered On) Samsung Galaxy S III | Verizon Wireless