Won't Charge or Turn on

My phone doesnt even turn on or charge and there was green stuff inside it

First try drying out your phone for a day or two with lots of dry moving air gently blowing past and around it, the phone must be unplugged and battery removed during this process, then once everything has been dried try charging the battery in another phone just like it, if it charges and see it it will power the phone, if the battery works put t back into your phone and try to turn it on. If it doesn't work in your phone but it does in another then its the phone, if the phone works with another battery its the battery but dry them both totally first, even a few tiny specs of moisture can screw up your phone when power is running through it, so be careful. Cheers!