Every Spring, and if I have left over oranges, lemons and/or limes, will quarter them up and rub them around my entry ways. Entry level fundamentals for Pagan and Witchcraft practices. Wards off most arachnids and other insects, they hate citrus.

Also use use them in my garbage disposal to freshen up the funk, also squeeze the juices out when cleaning my washing machine and dishwasher.