It is amazing what some paint, stain and sanding can do for an ugly dresser...they can make it beautiful. And a coat of paint on a wall...Wow! But the cleanup is a pain.
What is the worst and most hard place to paint? Behind the toilet.
I also knew there was gunky stuff that lives in the drains, but when you take apart the drain in the bathroom...ewww!!! How does hair, soap, water, toothpaste and spit turn into something black and slimy? Truly amazing.