squeaky belt pulley wheel
So I have this annoying belt pulley wheel squeaking lately (pictured) and I don't know what to do about it. It usually happens when it is wet outside, seeing as i live in Oregon its wet 9months out of the year. im kinda concerned about it. It happens on occasion but once the car warms up it usually goes away. Lately it has been lingering a lot more. I sprayed the wheel with some WD-40, making sure not to get any on the belt itself, and it went away for a little bit but came back. I have searched for some similar problems on the forums but i don't really see and fix. My belt is fine, it is just the wheel that is squeaking. Also in heavy down pores the belt slips and then catches, im thinking maybe it needs to be tightened? Is there a replacement i can get or any other fix i don't know about? Any help would be great thanks.