Hello camping friends, I have read the instructions, but am still a newcomer in terms of camping. Do you have to let the water out of the boiler at the camping bus (Citroen, Bj 2017) or do you let it off yourself with Frost? 2. Letting off the traditional water. Is it enough to let the water out of the taps into the sink or do you actually have to crawl under the car and let it off? 3. Dirty water. There it is enough to just turn the tap open and leave it open? Thanks already for the answers P.s. the car is outside and will probably not be moved for 2 – 3 months, since I do not want to have any salt on the bottom.