Why would using a combination sunscreen / insect repellent be a bad idea?  It seems like it would be a great idea, and I love everything 2-in-1.  Dr. Schultz let me know in his tip of the week why that might not be the best idea.  Since you need to constantly reapply your sunscreen, you end up reapplying a large quantity of insect repellent.  Which will keep the bugs at bay, however the harsh chemicals are not good for us especially when used in large doses.  Check out www.DermTV.com to see an episode on whether or not pores open and close.