But dys, I'm American. No way am I putting on, and removing tire covers several times a day. The treatments I have used are (I think) silicone oil based. Swell, except they are way to glossy and attract dust like round, black magnets. Furthermore, I don't know if they have any affect.
I like the pepper spray idea, farmerman, except these bug eyed little rodent looking things belong to very close neighbors who are quite tolerant of my cats' depredations. I discarded the taser idea for the same reason.
Somehow, the nitrogen treatment sounds like a very old Candid Camera skit involving an innocent looking Dorothy Collins taking the car to the service station to get the air in the tires changed. Anyhow, the issue is external cracking and weathering.
Help out with this old cycling legend while you're here though. They say that the tire inflaters using CO2 are not good because it passes through the permeable tubes faster than air. Now, CO2 is a much larger molecule than most things found in normal air. Are they just sitting around repeating stories to each other till it sounds believeable?