Of course you can throw your used oolong tea leaves. But is there any use of these used leaves? The answer is yes! They can be household cleaner!
First of all, you have to dry your used oolong tea leaves. Try to spread them on a flat surface and expose them to the sun. Make sure that they are completely dry.
Second, crush these leaves. Then wrap the powder in a piece of cheesecloth to clean floors and anywhere in your house. It can be used to pick up dust while giving the surface a gentle scouring. It is especially good for cleaning windows, bottles, mirrors, etc.