Haven't had the problem so far this snow season; however, I know it is going to happen, as it does every year. What do you do to prevent the dreaded chute clogging issue?
Carnuba wax, like for a surfboard. Basically keep the chute (the whole blower really) rust free and painted and waxed, if there's nothing for the snow to stick to it doesn't.
Park in a heated garage. Don't blow wet slush/snow, wait for the temperature to drop overnight.
My old blower had a square chute and it had lots of plugging issues. I sold it and bought an old Lucknow blower with a round chute and it doesn't clog.