I have a couple of stainless steel small developing tanks (1x35mm) with the standard black plastic lids. I used one yesterday, and to my horror, it leaks like a sieve. It's almost like the chemicals panic and scale the stainless steel walls of the tank in a rush to get out, even when it's not inverted. It's almost scary. I only switched to using said tank because the stainless lid on my regular stainless tank broke - the light baffle fell off. Is there supposed to be an O ring or something inside the plastic lids? I assume they are designed for inversion agitation, so there must be something wrong somewhere. I really don't want to buy a new tank, and if there is an obvious fix, that would be great.