I have a balanced pee valve and when I squirt disinfectant into the tube, it drains out right away.
Is this alright, or are there any tips to make the disinfectant dwell in the tube & valve longer?
Is your valve not closeable? The Halcyon balanced valve has a cap that twists between closed and open positions. I think the main idea is that if the valve malfunctions the diver could close it underwater to prevent water intrusion, but now that you mention it, I suppose closing the valve also allows one to fill the tube with sanitizer/disinfectant.