
The national Centers for Disease Control and Prevention recommends that consumers avoid products that mix sunscreen with deet insect repellent. Unlike repellents, sunscreens are meant to be applied liberally and often, so using a combination product could result in unnecessarily high exposure to repellents. Another reason not to use a combo: Many mosquitoes tend to bite long after the highest risk of sun damage has passed. The combination product we tested, Avon, has no deet, but directions say not to exceed three applications per day. It did not rate near the top for either purpose.