Indeed - being less flippant - I wouldn’t worry.
For whatever reasons, the cooling fan on my MP failed a few months back, and I had to replace. Despite all the horror stories associated with not using a landing pad and “the fan clogging up with shit”, I’ve neve used one and the fan and internals showed no signs of anything getting into the MP after over 2 years of regular use. (Photos of stripdown.)
I think most “bugs”, etc, will have been blown past the fan intake by prop-wash.