I had all my shocks replaced last year and today I notice when I go over speed bumps in shopping malls there is this squeaking noise coming from the back shocks. I open up my trunk and push down and I clearly can hear the squeak coming from the rear shocks. Its been warm last few days and now its getting cold again anything to do with the weather? Normal driving on the road with dips in the road I dont hear anything only reason why I heard it is because I went over a speed bump. Can I spray anything on it?