How to zero a thermal sight

You can't just use a simple paper target to zero your thermal scope in the dark – you need an aiming mark that shows up by being hotter or cooler than its surroundings. People use all kinds of tricks, from ice cubes to hand warmer pads to heated nails. Scott Country's Tim Dean runs through the options and reveals what he uses.

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[jnyhmx]

foil tape on cardboard, tilted back slightly and use the thermal in black hot, works a treat👌

[richarddoran]

Therma pads you showed were crap when I tried them.