I will co-wash and apply to damp hair. The steps that follow depends on what kind of DT I using. I like to make homemade DT's alot. For purchased DT's I usually leave it on half hour to an hour than rinse out, style as usual. For more moisture intense DT's I will make up a homemade DT, my favorite being coconut milk, honey, coconut oil, and maybe a little EVOO. I will kind of soak my hair in a bowl filled with the mix, wrap in an old towel until it isn't dripping anymore. Then cover with a shower cap. If my hair particularly dry I will wrap with a heating pad for a bit to help it penetrate. Leave on all night. I find with oil based DT's I usually do have to co wash in the morning.