Ball python Tub Cleaning?

So what do you guys use for cleaning snake tubs? What do you guys use to clean the snake poop and how frequently do you use clean them? Also...what is spot cleaning exactly? I've heard that term all over the forum but I'm not quite sure what it means.
Thanks again!

Dawn dishwashing liquid for cleaning. Chlorhexidine solution for sterilizing.

I clean when the tub gets dirty and not before. (some people will clean every week whether it needs it or not)

Spot cleaning is just picking up poop instead of replacing all of the substrate. This is done most often by people who use a particulate substrate like wood chips or shreded aspen.