It seems that my Amp (which is one of the first i have had this long and in a while) is no longer giving me the great tone it once did. The tone is lacking, and it will now catch strings that vibrate 2much in a nasty way. Ive had it 4 3 years

^What kind of amp is it?

Could it be possible that you just don't like the tone anymore?
^That's probably why.

Time for a new amp?
Your ears probably evolved.