Doesn't sound like you understand the difference between melting and dissolving, nor what is the process that you observe.
I read before those definitions:
1.Melting is also called fusion while dissolving is also called dissolution.
2.Melting involves a change of the physical state from a solid to a liquid without the use of a solute or solvent while dissolving involves the use of a solute and solvent to produce a solution.
In melting only one substance is involved and the liquid and solid are the same material. Heat is needed for melting to occur. Dissolving involves two materials; the resulting solution is a mixture of both. The dissolved substance is still present in the solution even though it can't be seen.
I should probably use the term dissolve,but since the PS item didn't actually dissolved completely and it looked like only the physical state had changed,i used the term melted.
But,okay,let say it dissolved,may we move on to the answer,please?