UDS Winter Clean

So my UDS has sat on the patio, unprotected from the elements since about Sept/Oct. Im sure there is rain and leaves etc. that has built up inside. I previously had a slight white mold issue which i scrubbed off and burned a bag of charcoal to take care of. I am planning on taking it to a self serve pressure wash to hose out the inside/outside in prep for a super bowl cook! Do i need to use any detergent (think simple green)? or would a good pressure wash and a few hours of charcoal be ok?

Thanks in advance guys and gals!

I figured when i run the charcoal for a few hours i would spray it down with oil as well....that would be qualify as reseasoning??