I have a Coleman Hanna fragrance vacuum that in general works great. I noticed today that someone left the fragrance spray nozzle laying on the ground and it left a large puddle of fragrance fluid on the ground. If I put the nozzle in the holder on the machine it stops so there must be some type of check valve that is not working properly and allowing it to siphon when the nozzle is below the chemical jugs inside the machine. Before I dive in and start trying to figure it out I thought I would ask if anyone can point me in the right direction. Thanks!