I find that when I do a deep conditioner, I like to detoxify my hair by either using a gentle-lather, sulfate-free cleanser; or a Malibu Hard Water/Swimmers treatment packet. This way, the hair is prepped and ready to accept the moisture I am trying to give it. These treatments can also "press the reset button" on limp and lifeless curls. Both hard water and chlorine can be so tough on hair; and I will address these specific problems in a future post to give you some ideas on how to deal with them.
For now, choose a silicone-free deep conditioner or an oil of your choice and try both of the following methods of application to see which works best for you.
Your deep conditioner can be applied however you wish, both on wet or dry hair. It is very beneficial to apply it on dry hair because the hair is like a sponge, accepting readily what you put on it first. This method works especially well with hair that tangles easily or is low-porosity, as you can use this as a pre-cleanse softener. You can also sleep with the deep conditioner in your hair if you simply tie it gently with a ribbon elastic hair tie or wear a shower cap. Just lay a microfiber towel or old tee-shirt over your pillowcase while you sleep. While the exchange here is that you may be using much more product to evenly saturate the hair, you may find that your hair just eats up that moisture like never before!
On the other hand, the benefits to applying deep treatments on wet hair are that you may use less product and achieve a more even application. Another positive is that you are able to use warm water to open the cuticle further, allowing for great penetration of all that beneficial hydration. When applying deep conditioner to wet hair, always squeeze out as much water as possible and you may even want to blot a little with a microfiber. I then recommend applying to the ends first working up to midway through, then using the remainder left on your hands for the top and part-line. Next, exit the shower to give the conditioner some time to work it's magic. You can sit under a hood dryer, or if you don't own one, try the method I show you in the video below! Cold water seals the cuticle back down, so I always recommend this as the final step after any conditioning.