Applied as directed, so far looks as if has worked, does not leave any stains whatsoever and so easy to apply by either painting on or with brush, I opted for brush as felt maybe spray would stay in air longer meaning possibly breathing in. i had no smell from it either but did as told kept room well ventilated as advised on bottle. The service received was first class as was the packaging which was safe and secure. Pity though that smaller bottles available as my infestation was spotted early and small area on ew table leg.
