A detergent dispensing cap for pre-treating a stained fabric. The coil is a band-like wire which is spirally wound such that the width direction of the band-like wire generally coincides with the direction of the magnetic flux that is generated by the permanent magnet of the rotor. The fixation element of one embodiment features a threaded stem with a spherical head. Additional supporting bases, any of which may include spring-urged-pusher tracks andor a spring-urged pusher, may be used under a wide product. Then, the first and the second solder materials are heated up beyond their respective melting points. In other embodiments of the invention, the dimensions of the longitudinal edges and the amount of twisting or pitching may vary widely over the full length or different sections of the guidewire depending on the intended application of the wire.