To add shine back to your bundles: buy semi-permanent CLEAR hair rinse and apply it to your bundles, following the directions on the bottle.
To add moisture to your dry bundles: add coconut oil or olive oil to your conditioner and deep condition under a hooded dryer for 30 minutes. If the bundles are not installed try putting them in a zip lock back and putting them in the microwave for 1 to 2 minutes (if you're not sure if your bundles can handle it, try 30-second increments).
To get rid of sweaty, smelly bundles: add 1 to 2 cap fulls of fabric softener to a half sink full of water and rinse your bundles in the mixture.
To deal with tangling at the nape area: fill a spray bottle with warm water, add argan oil, saturate the area, take a wide paddle brush and blow dryer, and detangle the area.
For fresh, clean hair: add a few scoops of baking soda to your shampoo.
To revive your bundles in less than five minutes: place the hair back into bundles so it's manageable, detangle the bundles (with a brush), fill the sink with warm water, add a half cup of Clorox to the water, place the bundles in the water and rinse the bundles in an up and down motion until the cuticles become smooth. (DO NOT perform this process while the hair is still in your head!).
-via Pretty Proper Hair