You might have already packed away your sweaters and scarves, but before this summer can really heat up, you need to give your grill its annual checkup. It might not be the most exciting item on your upcoming schedule, but nothing can kill an outdoor dinner party faster than a broken grill. So for the sake of future fun, follow this advice to make sure your grill is ready for its Memorial Day debut and beyond. Also read, How to kick off grilling season with proper food safety. 1. Deep clean the grates. Little charred bits don’t add flavor — by now, it’s just dirt that can make you sick. Cleaning your grates regularly will prevent dangerous bacteria buildup, improve the taste of your food, and also reduce the risk of fire. Grill grates can be cleaned a variety of different ways, but to really start the season off right, consider…