Any chance I can borrow that crystal ball of yours?
I have an AquaUV 114 watt with a wiper on my system for several years and the wipers reduce maintenance on the sterilizer a lot if you use them. The wiper arms are stainless and won't corrode but a bit of silicone grease on the wiper arm will insure it doesn't pit and will also keep the o-ring seal from drying out over time. Also, the wiper arms are cheap and easy to replace. Personally, I wouldn't buy a UV without the wipers.
I've kind of neglected to to use mine in a while but if you use the wipers a couple times a month a do a few swipes with it, it will keep the UV's sleeves clean and free of algae. Once a year when I swap my bulbs, I disassemble my UV and clean the crystal sleeves with vinegar by soaking paper towers with vinegar and wrapping the outside of the sleeves.