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I use a Kendrick dew heater and 50mm heater band.
So far (touch wood) the 50mm finder guider I use is the only thing that dews up, which is bad as I guide using this and the scope has a cow when it is covered in water.
I have the 2 channel dew heater controller with 2 outputs per channel, so I can add another 3 bands (for maybe DSLR, secondary mirror and main tube) if I want to or need to.
Luckily, the newt seems to be quite good with respect to dewing up. I have used a hair dryer once, when it got VERY cold and before I had the Kendrick. The Primary hasnt dewed up at all.
Cheers
Chris
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