I use the shower control
and I love it. Cleans hard water spots, soap scum and doesn't gas you out of the shower while you clean it. I bought mine at Home Depot and it's a little more pricey than other cleansers but I got tired of the fumes produced with such cleansers as Lysol bathroom and Tilex. I'll definitely look into their other cleaners. I hope they really are earth friendly and it's just not a marketing ploy though.