Laptop lid crackle problem.

Some days ago my laptop lid started to crackled then I close/open it. At first I haven't noticed it, but latter it started to crackle more and more loud. I step up and solved this problem with WD-40. I sprayed some to these places:

Now my lid works ( moves ) smooth and soft.

P.S. If you will do the same be careful!! do not spay onto lid screen, keyboard, ect.. ( you can't hurt them but you can have a long trip to clean thing ( oil ) out :) ) also save your or your work watching friend eyes!