Dry shampoo, not to be confused with shampoo for dry hair, is a powder that many people use between regular shampoos to reduce grease and build volume. You can buy spray versions or ones that come in a shake container. Apply a few squirts or shakes to your roots if your hair is looking greasy, and rub it around on your scalp to absorb the oil and achieve a matte finish at your roots. If you have dark hair, be sure to buy invisible dry shampoo so that you avoid getting a greyish tint at your roots from the white powder. Your greasy hair may actually be coming from a greasy scalp, which can be remedied with a shampoo labeled purifying or clarifying. Choose a day of the week to use this type of shampoo, and on the other day that you wash your hair, use your normal shampoo that you like for your hair type. If you like using matching shampoo and conditioner products, these shampoos do sometimes have an accompanying conditioner to go with them. You can use a purifying or clarifying conditioner for your ends, or your usual conditioner, on days that you use the purifying shampoo. However, keep in mind that clarifying shampoos tend to dry out your hair, so you may need a deep conditioner to restore the moisture. Shampoos and conditioners that are designed for dry or damaged hair may leave a thin film on hair to seal in moisture and protect it from further damage. While this is good for hair that is actually dry or damaged, all it does to hair that’s prone to oiliness is add more weight to the hair and make it look greasier. Similar to products for dry or damaged hair, shampoos, conditioners, gels, serums, or sprays that are for smoothing or gloss add an extra sealant layer of product on top of the hair. Hair that’s prone to greasiness needs less smoothness, shine, and gloss, not more. To use hairsprays and serums on hair that’s prone to greasiness, look for volumizing or products labeled “lightweight” instead. The oil-absorbing sheets that you can buy for your skin also work well on greasy hair. These thin paper...

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Write a summary of the previous text in Chinese:
在不洗头的日子使用干洗洗发剂。 每周使用一次“深层洁净”类型的洗发水。 不要使用干枯发质或者受损发质使用的护发产品。 不要使用“柔顺”、“亮泽”类的护发产品。 用吸油纸应急。