The heat is on, and with it comes a seasonal beauty conundrum: you leave the house looking polished, and by the end of a sweltering-hot day, your makeup has taken a slide. Avoid makeup meltdown with these tried-and-true tips to look fresh and lovely all summer-long. Go Oil-Free Heat and humidity can ramp up oil production in the skin, and wreak havoc on your makeup. Choose oil-free products, from your moisturizer to your sunscreen and foundation, to help stem the oil slick. Prime Time Use a primer before you apply makeup to help your makeup stay in place and last longer. Choose a mattifying product to help control oil production if you’re particularly oily or have acne-prone skin. Ace Your Base Instead of a liquid foundation, choose a powder-based one; the latest formulas provide great coverage with a translucent effect without drying the skin or looking cakey. Game, Set Use a setting spray after you’ve applied your makeup to lock it in place. Some new setting sprays double as makeup primers and can even refresh your makeup when sprayed on throughout the day. Spot Check Always keep blotting papers on-hand to whisk away any excess oil. And don’t worry: the papers only remove the oil, and not your makeup.