Ive got a MAriner 80hp that Ive had set up for several years. I took the top off and it is coated in mud dobber nests all on the inside. Ive broken all of them off I can see so other than a bunch of places of mud residue all over everything where the nests were, there is a large amount of mud nest pieces and debris down in the powerhead all around it that I cant get to. Can water be sprayed down in there or around on the powerhead for that matter? If not, how do I get all this stuff out? Thanks.