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Lewis,
Given the behaviour of the frost, ie., clearing slowly, I would recommend the following. Fire up you CCD for 20 min but don’t turn the cooler on. Let the heater heat up the CCD optical window. After 20 min, turn on the cooler. This way there is a bit of thermo mass in the window area of your camera to start with. This will slightly tip the scales for an underperforming heater strip.
This is the routine I use every time. Fire up all software and peripherals (including CCD’s) and verify that all is working. Check all wiring for possible strangulation scenarios or loose connections. I can do a polar alignment as no cooling is required for this on my rig. Soon, that 20 min is up and it’s time to turn on that cooler.
SBIG should give a procedure for recharging your Desiccant plug in the manual specific for your camera.
Terry
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