I use WD-40 and compressed air for those hard to reach places. Also if it is not flooded, then it could be a build up of oil and grime on and in the one-way bearing. What I hade to do was take my pull start off and I used WD-40 and compressed air to clean the bearing...seem to work just fine. I agree with Mickstix you have to use judgement...when it comes to the brakes, you shouldn't spray WD-40 over the pad and disk, and if you are using water, be careful around the electronics...stuff like that... although i jsut use WD-40, q-tips, rags, and compressed air to clean my buggy.