Hi there. Today while taking photos with my MP I realized some kind of liquid had dropped on the back of my camera. It had been dried before I noticed it. As a reflex I immediately clean the thing but the same stuff had also snuck on to the light seal cloth that covers the parameters of the back door. How can I clean the residue on the light seal? Or should I bother? I am afraid of the possibility of the strange liquid damaging the light seal.