I got out my bass today (it had been sitting in the case for about a month) and started jamming and i noticed really bad fret buzz on the low notes and open strings. I raised the action alot, and i still have the problem in the open and first 3 frets. Is there any way i can fix this myself. Im in college so i dont really have the cash to take it to a store to get fixed. The bass is an OLP Stingray 4 string. Thanks in advance for your help.