Volatile Material Dispensers

A method of allowing only compatible refills to be retained by a volatile material dispenser, the method comprising the steps of:

• providing a volatile material dispenser that includes a housing, a channel disposed within the housing, a member disposed within the channel, and a coupling for retaining a refill;
• providing a compatible refill that includes a container for holding a volatile material and a wick extending from the container;
• and
• inserting the refill into the housing so that the wick extends into the channel and the coupling retains a portion of the refill,
• wherein the member prevents a wick or a sheath surrounding the wick of an incompatible refill from being inserted far enough into the channel for the coupling to retain a portion of the incompatible refill, thereby preventing attachment of the incompatible refill to the dispenser.

A volatile material dispenser, comprising:

• a housing adapted to retain a compatible refill, wherein the refill includes a container for holding a volatile material and a wick extending from the container;
• a channel disposed within the housing for receiving the wick;
• a coupling disposed within the housing for attaching the refill to the housing;
• and
• an obstruction disposed within the channel that allows the wick of the compatible refill to be inserted far enough within the channel such that the compatible refill can be retained by the coupling, wherein the obstruction prevents a wick or a sheath surrounding the wick of an incompatible refill from being inserted far enough within the channel to retain the incompatible refill by means of the coupling.