It might work and it might not. They put the expiry dates on things to preclude any chance of the chemicals losing their effect by a certain date. I don't think they expire at the chime of MN on the given expiry date but how long after they are effective is anybody's guess. Yours is only 3 months out so might work just fine and I doubt it would hurt to use it but I'd keep an eye out for any scratching, skin irritation or seeing any of the little buggers just in case.