Ok, thanks all of you for your advice.

I have one more question should I also change the reso snare head because it's on there for almost 2 years right now. There are some small white "milky" looking spots also on the reso head.

The resonant heads on most drum kits are often pretty neglected and snare side heads even more so. I am quite certain if we ran a survey of forum members as to how often they change their snare side heads you would be surprised at how long guys leave them on there. I replace mine evey year or so at the very least as they get a lot of use and "abuse" for that matter. One thing to note is that snare side heads are generally tuned very tight and that will eventually wear them down.

If it won't break the bank, put a new snare side head on there. You will at least know you are starting from a level playing field. You might consider new snares as well as they stretch over time and, odds are that they will not stretch evenly. As soon as one strand is slightly longer than the rest you will begin to over-tighten the snares to compensate and eventually you will begin to choke the snare.

Oh yes, thats spot on!

Thank you very much for your help!