I haven't used my PSP in 1-2years, it's been in the same place (not in way of getting broken). Recently, I've tried charging it but it won't charge at all. Is the battery bad or what?
No, it won't receive a charge AT ALL, the red light won't come on when plugged in/it won't turn on. How would i go about cleaning it? Just dry dusting?
I think perhaps that your battery has gone out and something is wrong with your AC adapter. Does your PSP turn on at all? Have you tried taking out the battery, then plugging in the AC adapter?
If it won't charge at all, I bet it is the AC adapter and not the battery. Trying jiggling it around in the plug on the PSP (if its like a phone one) or buy a new one.