Since I have the air box off to do a valve clearance check and throttle body balance, I added a screen to the air box input to help prevent mice from building a nest this winter in the air box.
With my ST1100, every spring I would remove the air cleaner housing and check to see if a mouse nest was in there. It was only about a 15 minute job on the ST. Since it's a lot bigger job on the TTSE, I thought I would add the screen. If a mouse built a nest inside the air box, I think it could pretty well clog the air filter after the bike is started in the spring.
I also keep a tray of moth balls under each bike when in storage.