Why do we cool the solution after melting it?

We conducted an experiment to analyze the molar mass of a solid by observing the freezing point depression it brought to cyclohexane. In short, the experiment procedure is as follows


the freezing point of the pure solvent, cyclohexane, is experimentally found $\Rightarrow$ the freezing point of the solvent +0.2g of camphor was experimentally found $\Rightarrow$ the freezing point of the solvent and another +0.2g of camphor was experimentally found $\Rightarrow$ the freezing point of the solvent and another +0.2g (total 0.6g) of camphor was experimentally found.


However, between each step, after the solution is melted to get rid of the solid, the procedure says the solution should be cooled before being used again. Why?
Why can't we immediately continue our experiment once the solution is cooled? Will there be any difference?


