Trackpad ability to click is randomly successful. Can it be replaced?

A while back the amount of clicks accepted by the trackpad was was fading. I opened up the MacBook Pro, cleaned and tried different settings to the trackpads click adjustment screw. This seemed to work but not 100%. Since then it has slowly faded to the point where i don't use the trackpad for clicking. I now tap to click. this is only a partial solution since click and drag becomes a huge hassle. All the other functions of the trackpad work fine.

Is there a good trackpad cleaning tutorial?

Is it possible to replace the trackpad?