B How often do you re-acquire dark and bias frames?

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The discussion centers on the frequency of updating dark and bias master frames for astrophotography. Users suggest that re-acquiring these frames should be done periodically, especially if the camera sensor may degrade over time. Many recommend updating a few times a year, particularly for those who shoot regularly. The ease of generating new frames with cooled CCD cameras is highlighted, as it allows for quick and efficient updates. Regular updates can help maintain image quality and accuracy in astrophotography.
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Semi-random question: I generated dark and bias master frames (and from those, bad pixel maps) about a year ago. I'm sure my camera sensor has degraded over time.. b/c entropy... and so I'm wondering if it's worthwhile to create a new set. How often do you 'update' your dark and bias master frames?
 
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Perhaps a few times a year when I'm regularly shooting. I have a cooled CCD camera, so making a new set of dark and bias frames is trivial. I just set my camera up inside during the day and let it go to town taking as many exposures as I want.
 

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