The invention relates to the use of a betaine as a foaming agent and a foam drainage reducing agent. The assembly provides a fine aromatic oil mist from the glass top when the jet unit is energized. The present invention also relates to managing the automatic connection of a subscribed communication device to a network, where a preferred network and preferred subscriber network identifier may be used. As a consequence, the bubbles become more stable. Also provided is a polishing pad produced according to this method, and a polishing pad comprising a region that is at least translucent, wherein the translucent region is porous, as well as a method of polishing a substrate using a pad of the invention.