Dew Heater Causing Poor Guiding?

[bobro]

Thinking back to last night's imaging session, PHD2's guiding graph was bad with 'spiky' movements in both RA and DEC. Normally guiding is much better than that and DEC will show as very stable on the graph.

As I was imaging high in the sky, for the very first time I used a dew heater band wrapped around the lens of the Orion 50mm guidescope to save me from continually wiping dew from the lens.

Could the dew heater have caused the apparent poor guiding? (Images weren't great either.) If so, any tips on using one?

Thanks

[newbie alert]

Nothing to do with dew heaters..

Maybe a balance issue thou, as high and crossing the meridian  has it's issues..I've had it before where my dec trend totally disappears..!

Edited July 24, 2019 by newbie alert
Damn phone