This feature must be observed on very fresh material in excellent condition. In dry, hot or windy conditions the surface of the stipe will rapidly dry out and any sliminess disappear. When a viscid or glutinous stipe has dried out, fragments of leaves or litter (or even small invertebrates) can often be seen sticking to the stipe surface; in a dry or moist stipe such fragments are readily blown away or brushed off. Another sign of a viscid or glutinous stipe that has dried out is that the surface may be shiny (as if varnished), although this is not always due to dried slime. If you suspect that the stipe has dried out, look around for fresher fruit-bodies which might be found nearby under leaves or litter, or in other more protected microhabitats.
All taxa that are coded as glutinous are also coded as viscid, because as a glutinous stipe dries it can go through a stage when the slime layer thins and appears viscid.