Keeps flies away!
You won't need a fly swatter if you halve a few lemons, limes or oranges, push cloves into them and place them on the table. This looks nice, smells good, and drives away pests. Wasps, on the other hand, are hard to drive away, but you can distract them. Simply place a bowl containing juice, jam or overripe/bad fruit a small distance away from the BBQ. You can also try avoiding clothing, table decorations and other utensils in white, blue and yellow – wasps are drawn to these colours!