If you have a washer or plumbing for one make the there is water in the pee trap for it. All pee traps need to be cleaned out and have water. I use a little bleach when I fill mine and let it set for a while. My washer pee trap gets pulled empty if I dumb a close to full grey tank.
Finally Retired-60% Time in Motorhome
2000 Dynasty Regent, 8.3, Banks Turbo, McCabe Racing 5" Diameter Exhaust, 475 HP 1425 Torque towing 05 Pilot 700W solar & E-Bikes