I'm wondering if I'm having the same problem. My 5n1 is attached to the top of a 6' metal conduit which doesn't have much play, but there is a bit. Over the last few days we have had nothing but clear skies, but wind gusts up to ~30. The 5n1 is reporting .01-.03 per day. Minor, but incorrect. If I want to shorten the pole to reinforce, what is the best way to avoid false readings while the 5n1 is moved? Do I insert the shipping lock that came with the device? Remove the batteries? Clear data after the changes (I report up to WU so not sure if a clear data would remove what is reported there?)?