I don't understand? I press the link on my phone's home page, that takes me to the "things due today page" and then press the little tick box to say I've cleaned the shower. After a time the "clean the shower" task will be due again and so the cycle continues. If I'm honest things are usually over due, but it still means that the shower is getting cleaned more frequently than it did before.

Before, I noticed the shower needed cleaning just as I was about to get in it. The shower would then stop existing just after I got out of it, but a little dirtier.