To apply:
Using your index finger push some up onto your nail. Then half the wax between your index finger and your thumb of the same hand and apply to your string running these fingers up and down the string. Long bow and recurve folks you can do this with the string on the bow or off. If you wax with the string off, be sure and go with the twist in your string. Get the ends good too. For compounds use the same directions, but your string will be on the bow. Be sure and get all the strings. If some gets on your pulleys it's no big deal. Just wipe it off.
If you have a long bow or recurve, the wax isn't just for your strings. You can apply the wax to the bow itself using your fingers the same way when applying to the string, but wipe it on the bow. Leave it on for a few minutes and then wipe it with a dry towel or rag to take the wax off. There is a little work to this but it will condition the wood and help repel water if you get caught in the rain or, if you are like me and sometimes love to hunt in the drizzle. Note: Do not try this on bows that have a rough surface like sinew backing or snakeskin backing before testing on a small section first.
This wax can get hard if left in the cold. Simply put in your pocket for a bit or put where there's warmer air.

