The best weed killer to use for creeping charlie is Bonide’s Chickweed and Clover Killer. Just like all liquid weed killers, Bonide’s Chickweed and Clover Killer is absorbed through the leaves of the weed. It kills the roots too but is absorbed through the leaves. Because of this you need to apply it when rain isn’t expected for the next 24-48 hours. Naturally you won’t want to water it in so you’ll need to shut your sprinklers off for a couple of days. You also need to know that no weed killers should be used on a lawn when temperatures are expected to go above 85° of it will also kill the lawn. Adding a drop of dish washing liquid to the spray will help it coat the weed’s leaves for better contact.