See what others say, but if you get in 15 or so nights observing Jupiter, I reckon only 2 or 3 might have good enough seeing for detailed views.
That said, check that you are not observing across metal roofs, expanses of bitumen or car parks. Could be some local thermals in the air due to these areas - particularly, of course, in early summer evenings.
You could try popping your Moon filter onto the eyepiece and experiment. Some feel that reducing the brightness can help?
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