An insect repellent machine is provided comprising: a front panel means； a back panel means screwably engaged with said front panel means or optionally said back panel means is snap or click fitted to said front panel means providing a housing for a repellent bottle holder means, a heating means, a circuit arrangement for operating said heating means wherein said holder means comprising an adaptor having a lock-in profile with air-vent facilitating evaporation of liquid repellent and avoiding spillage from plug holding the wick of the repellent bottle； and wherein said lock-in profile is adapted to be substantially concentrically inserted into the refill bottle plug with the wick being disposed through the said lock-in profile.
