Andy's Drysuit question

[PNW Dive Girl]

My great Andy's drysuit has been leaking. I've had all the seams resealed, pressure tested and it still leaks. I think it's my exhast valve (located on my left arm). Took it apart to soak and check it. It had quite a lot of silicon glue everywhere. I'm thinking the build up was causing a problem. My question is: (and I've gotten a couple of different answers) When putting it back in/on my dryusit, does it need the silicon glue or is hand tight adequate?

Thanks!!!