Detailed Instructions: Given a paragraph about cooking, and a set of conversational question answers about the paragraph, answer a follow-up question from the paragraph. The paragraph has a prefix 'CONTEXT:'. Each conversation question has a prefix 'Q:' followed by answer prefix 'A:'. The final followup question has a prefix 'FOLLOWUP_Q:'.
Q: CONTEXT: The cause is that the mousse dries out on the surface. It builds a skin of dehydrated mousse. It happens with most cremes, not only your yolk foam. To prevent it, put plastic wrap on the mousse. Don't span it over the bowl, press it on the surface itself, without leaving air between the mousse and wrap. Your mousse will stay soft. This also works for custards and starch-thickened puddings. In general, also cover other things you put in the fridge, or they can get an unpleasant odour. <sep> Q: Why is there a rubber like skin on surface of my chocolate mousse? A: The cause is that the mousse dries out on the surface. It builds a skin of dehydrated mousse. It happens with most cremes Q: Is there a way to prevent it? A: put plastic wrap on the mousse. Don't span it over the bowl, press it on the surface itself, without leaving air between the mousse and wrap. Your mousse will stay soft <sep> FOLLOWUP_Q: Is it harmful to have the rubber surface?
A:
In general, also cover other things you put in the fridge, or they can get an unpleasant odour