I noted that the Burgman was a little slow off the mark in Power mode... Thinking it was time to change the air filter, I found a mess... A mouse had built a nest to winter in on top of the air filter... 3 hours later, I got all the tupperware off and cleaned out the mess. None went into the intake box, though some scraps were in the connecting tube. There WILL be a wire screen covering that opening... I'd recommend it to any climate that hibernates rodents.