I had a spider take up residence in a handlebar switch housing on a motorcycle I used to own. The headlight kept going off intermittently until I cleaned the dried-one smooshed spider from the contacts.
dried-one = dried-ON
Sheesh.
Years ago our heat pump quit working. I removed the cover and found an earwig squashed between two relay contacts. His juices had reacted with the electricity and the contact was ruined. Bad timing on his part. Damned bugs!