Review title is Does Not Rinse Off Easily [SEP] I have never used mold remover gel before so I wasn't sure what to expect with this.  I usually spray some bleach cleaner in my tub and use a brush to scrub.  I applied a thin layer on my grout, which was not gross but needed to be cleaned.  I left it on for an hour and then tried to rinse it off with the shower.  It would not rinse off unless I scrubbed it.  Even when I used a brush I could still see a thin layer of the gel on my tiles.  This made me very nervous as the box says that if you touch the gel you should monitor yourself for sickness.  There were no instructions on the box to tell you how long to leave the gel on.  I left it on for about an hour and when I attempted to rinse/brush it off, there was very little difference than when I had started.  I would not use this again.