I had my helmet liner . . . And just tried not to think about it! In addition, it was so very, very cold then that I don't know that bugs could live.The Village Day Lodge Rentals shop at Sun Peaks rents ski pants and jackets mostly to Air Canada passengers whose luggage ends up arriving on a later flight. With Pacific Western airlines this almost never happens.
At Elevation Ski & Bike we rent out a surprising number of helmets and sometimes goggles, usually to someone who has left theirs at home and doesn't want to buy another pair.
If I was to ever rent a helmet, first I would buy a helmet liner but I have never seen anyone do that. At the end of the day I spray the inside of returning helmets with the same stuff that we spray inside the returning boots.