Herb

When winterizing my camper I was getting antifreeze back in my freshwater tank I have camco converter kit installed this is the first time that it happened it work perfectly for three years

The smell is when you flush the toilet it is coming from the tank I have done everything I could do to make it go away I have bought every chemical there is and nothing works

Replaced the vents with cyclone rotating I have tried everything

I have my rv permanent in a campground every time I come my holding tank smell so bad I have tried everything to fix this but the next week it is the same way any idea on how to correct this

I have destination RV it has a propane furnace and roof air the fan in the roof air runs the hole time the furnace is on

Is it normal that the roof fan blows out air the hole time that the furnace is working