How do you remove melted plastic from glass?

Melting plastic is tricky because you can easily char or burn it and can be dangerous because of the fumes released when the plastic melts. Also, different materials melt at different temperatures which can also make it difficult. If you have access to a pottery kiln, you could try putting the plastic in a kiln-safe container and melting it that way. However, it is unknown what will happen if you do so. Either way, I would not suggest melting plastic at home, just re-use it for something else or recycle it.