During initial tests of my OpenROV in a washer machine (in the lack of a better option), I noticed spots of oil on the surface, probably due to the orings lube and silicone spray/wd40 for the motors.
I see that this is kind of unavoidable, but I was wondering how big of a problem it is when used in sensitive locations, like to inspect fish farms or touristic places. Has anyone had to address this problem? Is there a way to reduce this issue? Some alternative products, or some process I could do to prevent this?