Rather than answering that, Spinister makes a rude face at Tarn. He'll be as rude as he wants to be, just you watch him.

He grabs one of the soaked rags and starts on the back of the DJD commander's helm. It made sense to start from the top most part and work down so that the dust followed the cleanser instead of getting everywhere.

This was probably edging into the sort of weirdly intimate area of things but Spinister was bound and determined to just keep powering through it. Tarn was going to be CLEAN.