dunno, hard to visual where the tank, vent and fill tube are located on your unit...
and the water pump.
maybe some pics would help ?
but moisture UNDER the pooch bed is very very common, if placed on the vinyl flooring.
i typically remove/flip the hound bed or put an old towel under it (for wicking) and air dry that every few days.
it's also common for moisture/condensation to happen under the human mattress and behind any cushions...
so check all those spots too.
all of the true things that i am about to tell you are shameless lies. l.b.j.
we are here on earth to fart around. don't let anybody tell you any different. k.v.