Hello to all fellow campers! I am a little confused as to how to perform the winterization on our 2022 303RLS. I winterized our fifth wheel last November 2022 first by blowing air through the "City Water" hose inlet, and Nautilus panel set to "City Water", then opening ALL taps inside & outside RV (including toilet). I also opened the "Drain Plug Cover" on Tankless Heater as well to rid any water there. Using the "Winterize" settings on the Nautilus panel to suck antifreeze from a 10 Litre jug of antifreeze, I opened all taps & toilet until I saw pink. I have always had a 6 gallon water heater in our past RV's that I drained before winter, no worries. With the new Tankless heater I am concerned that if not winterized properly that any remaining water left inside water heater may damage the unit. Any tips would be greatly appreciated before cold weather sets in. Thanks for all replies in advance!