not sure if you have the same hardware as I do
I had my daughter crawl in one of my larger compartments early on.... she was small, adn the compartment was big so it was "FUN!"
Anyway, with her in there holding a flashlight I turned the hose on it.
Found that the water gets in past the little thumb latches and locks.
I never did really find an economical solution. I think it's more than even a lack of gaskets. The mechanism itself isn't weather proof.