If it came up all of the sudden it could be a drip/leak causing mold, or overflowing water from the refrigerator drain line or evem condensation leaking onto carpets from "sweating windows".
Febreze!It's actually amazing how well this stuff works! They have sprays, de-oderizers, candles, stickups and they actually WORK!
My posts shouldn't be taken for factual data, and are purely fictional, for entertainment purposes, should not be constituted as related to scientific, technical, engineering, legal, religious, spiritual, or practical advice. After all it's FREE! Amen. :W