You may be able to make your own oil solution out of olive, argan, and coconut oils. You will likely need several applications, so be sure you buy enough to cover your head several times.
After you have covered your hair completely, place more oil in your palms and massage it through your hair again to be sure it is completely saturated. Oil should be dripping off of your hair. If it is not dripping a little, you have not oiled it enough, and you should apply more.
Leaving the oil on overnight may be beneficial. If you leave the oil on overnight, cover your pillow with a towel so that it will not get oily if the plastic moves in your sleep. Testing showed that a 12-hour application of oil had significantly greater impact on hair tint than 2-3 hour applications.
Try massaging the first application of shampoo over the oil before wetting your hair with water, then rinsing well. Lather with shampoo and rinse several times, until your hair no longer feels oily. Depending on the oil, the shampoo, and the hardness of your water, this could take many repetitions to get the oil out. Use water that is very hot, and be sure to rinse thoroughly.
Give yourself a week between oilings to give your hair a chance to recover a little and produce its own natural moisture.
Freshly squeezed lemons will yield better results than concentrated lemon juice. Combine lemon juice with water and dip your head into the mixture to coat your hair completely. Go outside in the direct sunshine and let your hair dry. You may want to “fluff” it with your hand periodically to be sure that multiple layers of hair are receiving the benefit of the sunlight. Be sure to moisturize your hair or do a deep conditioning treatment after applying acidic products.
Leave the honey on for at least 3 hours, longer for better results. Be sure to wash thoroughly with a clarifying shampoo afterwards. You may want to stay inside while letting your hair soak so that you do not attract bugs or bees to your head.
Coat your hair with hydrogen peroxide. Be sure not to get it in your eyes. Leave the peroxide on for an hour. Apply heat by going out in the sun or blow drying your hair on high heat. Wash your hair with a clarifying shampoo. Do a deep conditioning or hot wax hair treatment to help salvage your damaged hair.