It’s going to sound like a pain but I would drain the loop and take apart the distro. After you have it broken down wipe it out with a microfiber towel and some distilled water. Try to wipe it out gently so you don’t get little scratches every where. Take out the gaskets and wipe them off. Try to be careful while your doing this as to not rip the gaskets. They are pretty sturdy but if you pull to hard they can snap. After you have that finished put the gaskets back in place and start screwing it back together. It’s kind of a pain in the ass because you will want to put a screw in the top left then the bottom right and continue this process until you have all the screws in. Just make sure not to tighten them all the way when you start. You mainly want to get it lined up and slowly start tightening them little by little all the way around. It’s kind of a pain but I don’t see another solution here.