I should have been working on my props last night, but instead, I went to Halloween Horror Nights to take a break and do a little resarch. Most of the haunts had some kind of smell effect. Is there anyway to generate smells without burning insense? Maybe scented oils with those wicking sticks? I am searching for them, but I am finding things like "fresh" scent. What i am looking for is stale, musty, and earthy.