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I don't know how many hot pixels you might expect to see in a new camera. My asi224 is a few years old now and has a few hot pixels (but I haven't counted them). So not sure if it's bad enough to return. Maybe others can answer this??
But if you persist with it - When live stacking in sharpcap I always first collect darks and then ask sharpcap to subtract them (it's under preprocessing) while stacking. This will remove the hot pixels, and also the amp glow with this camera. I do this all the time when doing live stacking. It doesn't take long as I rarely use subs longer than 15sec. Doing 8x darks only takes a few minutes.
I sometimes also do some sky flats. But more so with larger sensor cameras.
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