Haven't gotten around to buying any new products yet, Zanio, bar keepers or anything else. I was given a clazillia fake clay bar kit while I was in Calgary last week. Just a foam type handle with some velcro on it and a rubber pad that velcros to the handle and a bottle of zilla juice. I used up my real clay bar doing all the windows in our cars and trucks. I just got back from a 2000 mile trip across the Rockies, it rained like hell a couple or three hundred of those miles and covered the car with some pretty ugly road grime. After washing the car, I could still see where the wipers had scraped off the grime but could still see the grime where the wipers didn't touch. I thought the clazilla may work as well as the real one so I tried it on the windshield. No difference, did it a couple times more, may as well have saved my effort. The fake claybar did diddly squat. Tried windex which wasn't much better, some bath and kitchen cleaner with similar results. I wish I'd bought the bar keepers friend! I got out an old bottle of Meguiar's deep crystal paint cleaner, step one in the three step system. I had to go over the glass twice but it got the windshield clean. As for the paint, it looks clean but I know i'll have to give it a thorough bar, cleaner, polish and wax treatment.
Just thought I'd pass this on in case anyone was thinking of buying a clazillia clay bar system, save your money.