Stapling it to a 4x8 sheet of plywood that's been outside for months.What were you using to tape/stapling it to??
Sounds strange, like above try small square of foil, a hot pocket should not light up a whole piece of plywood?? unless it was baking in the sun.Stapling it to a 4x8 sheet of plywood that's been outside for months.
I haven’t tried to zero my scope yet, but this was my plan.Following the adage of Aim Small/Miss Small, try cutting a 1/2" to 1' size square in heavy cardboard target,
then tape or staple your hand warmer - to the Backside of the cardboard.
Now you have a small heated opening on the front of your target for aiming...