6 ways to whiten flexible phone cases that are extremely yellow or very little known
1 Why is the phone case yellow? Most of the flexible cases on the market are made from Thermoplastic Polyurethane , Abbreviated TPU . This material helps to create a durable, flexible and flexible case. But with prolonged use, many cases start to turn yellow due to exposure to the sun, heat, moisture and sweat from your skin. Stains on TPU are caused by a chemical reaction and usually cannot go away on their own. These yellow stains do not affect the protective function of the phone case, but they are unsightly. 2 Tips for bleaching yellowed phone cases Use dishwashing liquid This is an extremely simple way to use dishwashing liquid in your kitchen. With a little diluted dishwashing liquid , you only need to use a toothbrush to scrub the surface and every corner of the case to be able to remove the yellow stains very well. Use isoproplyl alcohol In case of heavy stains, difficult to remove, cannot use dishwashing liquid to wash, you can choose Isopropyl alco...