(if you’re not a year-round griller): Take the grill out of your garage or basement. If you are using a gas grill, make sure there are no spiders or cobwebs under the burner knobs or in the grill manifolds (dislodge any you may find with a slender bamboo skewer). If any of the tiny pinholes on the burner tubes are clogged, unclog them with a pin. Make sure the burner valves turn freely: If any feel stuck, spray in a little WD-40. Check that all connections are tight and that there are no holes or worn spots in any of the hoses. And most important: Follow all of the manufacturer’s maintenance instructions.