Qualifying this question with I have very little experience with RDAs. I use them to test out my juices to get a good feel of how they'll taste. One coil, very simple (so far). Are RDAs supposed to be difficult to take the cap off? On all of mine, I have to screw it into a device or ohm reader in order to get it off. Or am I just not lubricating the o rings enough?
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