I usually just crack a window a little to let the air circulate. I would worry about leaving a candle burning all night......but I am often called "Safety Susie" :)
Lee ".......and God sought to bestow upon man a supreme mark of his blessing. God created the horse. The horse could run faster than the deer, jump higher than the goat, and endure longer than the wolf. Man, being encompassed by elements that sought to destroy him, would have been a slave, had the horse not made him king."