Mix 1 tblsp baking soda with three tblsp water (more if you have long hair but keep the ratio). Apply to dry hair scalp first. Let sit for one to three minutes and then rinse with warm water before applying the conditioner:
One part apple cider vinegar and four parts water. Distribute well and finally rinse with (almost) cold water. Your hair will not smell of vinegar, but if you want another fragrance, ad a few drops of lavender or other essential oil. (A large amount of this conditioner can be kept in a bottle by the shower. If you add essential oil, remember to shake well before use).