This question is for my wife. She is wondering what people use to clean out their toilets and tubs. We have an older, 1996 Travelair 5th wheel. Are there specific brands that are best? Or can she just use dishwasher soap? Probably not the same stuff she'd use in the house, we're assuming. Today we head off to Calgary and then Banff for some camping this week and next. I love the mountains!