Concerned about your printer the first time you use your timer this season?
Yes the thermal paper in your timer can go stale. Remove the roll and peel off a meter of paper and dispose of it. Reinstall shiny side out. Make sure the printer function is turned on and batteries are fresh or charging.
This will also check the ability of the paper roll to move freely in the compartment. Paper can unroll after transport and get jammed as it expands.