Hair conditioner. Mix a tsp of apple cider vinegar and a tsp of glycerin. Mix ingredients until smooth. Mix in a beaten egg. Add 2 Tbsp caster oil. Thoroughly mix. Apply mask on the entire length of the hair. Place hair in plastic cap and wrap your head with a towel. Leave mask on for 2 hrs. Wash hair using shampoo. The mask should be done 2x a week for a month. After 1 month, apply 1 time every 2 weeks to keep hair in good condition.
Tutorial on how & why to properly clean your makeup brushes. (a tablespoon of white vinegar in a cup of hot water, and a 20 minute soak, followed by a hot, then cold rinse and pat dry will do it. Disinfects, dissolves grease/makeup, leaves no film, and inexpensive.)