I applied the diy kit to a week old shower screen. Even after a week there was a tiny bit of lime build up so I lightly used the steel wool. I think surface prep is everything! Spent maybe an hour prepping and 10min applying.
We’re now maybe 6 Weeks in and has been fantastic. You really should follow the maintenance instructions though. We rinse and squeegee after most showers. The other day the water was beading less and I did a thorough clean with vinegar and a cloth and it’s back to 100%. If the lime/soap builds up it will appear worse and be harder to clean, and my guess is any reviews complaining about it “wearing off” aren’t maintaining their shower well.
Overall seems like a great product. I’ll try and review again at 12 months!