Matches in a Waterproof Container
Matches are no good if they get damp and won’t work. Keep them in a waterproof container that has a screw-down top with a rubber gasket.
A firestarter by definition is an aid to starting a fire in damp weather, without the use of matches.
Carry a weather-resistant tinder source and a compatible ignition device, such as a magnesium fire starting tool.