When you dream of melting substance, it means you are also “melting”, and being slowly eroded to destruction. It could mean your self esteem (confidence) is slowly being eaten away by hardship. You may be facing an uncalled for self change, which you have no control over.
Dream analysis and intervention:
I would reflect on myself and current situation in life. I would think about my adversaries and be aware that whatever others criticize, does not accurately describe me. On the contrary, people may be jealous, or have their own ulterior motive, for trying to take me down.