We're looking for the cleaning instructions for the tub...Someone had kindly posted a "Tub 101" , and search is disabled...if you have it, would you kindly post it? I promise, this time I'll bookmark it!!
Don't know if this is what you want, but this is what I do for my home one.
Put a cup of Cascade (or dishwashing detergent powder) in the full hot tub (filled with hot water). Turn it on for 30 minutes or so. Drain, refill and turn on with clean water for 20 mintues.