I wouldn’t advise reusing those face sponges. For hygiene, it’s best to use once and throw away because it has dirt and stuff stuck to it which you don’t want to re-introduce back into your face and create more problems like clogged pores or acne
Girl I know Shein is really cheap but it’s cheap for a reason. It’s terrible for the environment and has recently been proven to have toxins in the material that can get into your skin. Maybe do a bit of research on it and it might be better in the long run, to invest in better quality clothing that will last you a long time 😉