Gently, remove any visible dirty or particles clinging to hair
From bottom to top, de-tangle and comb the hair with your brush, and remember not to do it vise-versa ( from top to bottom), otherwise, your hair will break badly
Rinse your hair and extensions with warm water.
Apply mild shampoo whilst your hair is in hot water and remember not to rub hair, instead, pass through your fingers gently.
Squeeze out excess water and apply very nice moisturizing conditioner and massage nicely.
Dry your hair naturally, or for quick results, use slight warm dryer.