How do I use camphor in my house so the house gets mildly scented with camphor.?

Answer 1

camphor moth crystals r longer lasting than camphor balls. u can put them wherever pets can't reach 'em, like behind refrigerator, under or behind stove. sprinkle under couch cushions, etc. gives pleasant smell and repels roaches, silverfish, slugs, fleas, etc

Answer 2

Dab some camphor oil on both ends of a q-tip and straddle it over your lampshade wires at the top. When the light heats up, it will release the scent.

You may also want to investigate whether or not you can refill the "plug ins" that go into electrical outlets. Be careful though!