The absolute WORSE thing you can do to a diesel pusher air cleaner is to vacuum or blow it out with compressed air. You're taking a HUGE chance of moving the dust the filter captured to a place where it will be ingested and destroy your engine.
I give little or no value to the Air Minders. To me, they're totally useless. For the average guy doing 7500 miles a year, three years is a good change interval. We run between 10K - 15K a year and I change my filter every two years. My coach always performs well and I like keeping it that way. On one occasion, I bought two air cleaners because I got a good deal. This not a good idea, if you leave one setting for two years. Buy a fresh one when you're ready to change it out.
If yo own an expensive diesel pusher, don't cheapen out on maintenance.