Um... this really excellent person comes around once a week and cleans my bathtub for me. That's pretty relaxing for me and the company uses environmentally friendly cleaning stuff.

When I was young bathtub scum - which mostly my mum wiped down just before next bath - was atrocious, but that could have had to do with the size of my family. Three kids having daily baths is a lot of dirt. I don't think mum was particularly concerned that she cleaned the bath with non-enviromental-or-kid-friendly 'cream cleanser' because that was the time and her culture. She's also a nurse; she's used to hospital strength cleaning.

How does it get to be relaxing?
You take a glass of booze in with you, and get your spouse to remove the kids from the house. And get someone else to clean the bathtub. (Yeah, so very practical!)