So the last two cars I have detailed I have noticed that after working with the Makita for a bit that there is a small amount of yellowish fluid, like an oil present near the handle and surrounding the spindle. Also, when operating below 1000rpms there is a slight crackling sound. I have not been hard on this machine and its about 7 months old and I have done around 15 cars with it. Can anyone provide some insight? It is still working fine and the substance is very minimal but noticeable in the said areas.