iSight not able to keep focus

Hello I have an iSight that I’d like to use again with my iMac G4, the problem with the camera is that it constantly tries to focus every couple of seconds but it is never able to, so the video is blurry… I’ve tried testing to see if anything at any focal distance is clear, but it seems the whole thing is blurred at any distance.

It still “works”, but would like to know if anyone has solved this problem.

Thanks in advance!