Yes antifreeze is the pick stuff.
Antifreeze has a smell, usually sweet and can be sickening to some people. Side note: Different brands have different smells to them, I cannot stand the smell of one of the brands that is for sale around here.
Other smell could be water in the fresh water tank gone stagnate, fill up, drain do this a couple times, then fill up and add a cup of bleach and let it sit for a day and drain and flush a couple of times.
The other area could be the hot water tank. Mine on my TCer would sulfate and would STINK!!!!! Would have to flush a couple times completely with fresh water and then with some bleach mixed in with the water till it would stop. My wife always thought it was me that smelled so bad :-)
