How to Fix Loose Whammy Bar

Having a loose whammy bar is really frustrating. You are not a able to do a perfect and clean vibrato, because of this loose whammy bar. Don't worry many guitar players are experiencing this kind of problem. You can't fix this problem by only tightening the whammy/ tremolo bar all the way down. Now I will going to show you the solution for this, which I've learned from Justin Sandercoe. 
You will need:

PTFE Tape/ Plumber's Tape

1.Take off the whammy bar on the guitar.

2. Simply wrap a little of amount Plumber's Tape around the end of the whammy bar at the thread part, like this.

3. Put back the whammy bar in place and your done! 

Here is a video from Justin Sandercoe: