Chris, I'm not sure about this as a solution. Some friends and I were discussing non-wicking wire. My (humble) opinion is that you need some way of transfering air from the light head when you push the test tube on otherwise the positive pressure will push it off. I have noticed that it is much easier to remove or replace the test tube when the lid is off the cannister. r Paul > Claudia, > When I replaced my electrical cord I peeled the > insulation back from both ends (after cutting it to the right > length), put a wad of aquaseal around the wires, then pulled > the insulation back up. This will keep any water from getting > through a nick in the insulation and into the canister which > may be what's happening to yours. > C.
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