when my OBT sling recientaly molted, it acted the same way. well, when it was in pre molt it acted this way. a day it molted, it was out and about.. im DEF no expert, but i think that as they start to molt, they get slower and feel volnerable (sp?) and just kinda hide.
if you feel like its molted, take a tooth pick (preferabaly something alot longer) peel the web back and see if you find the molt... i found mines molt last week, so in a day or so, im gonna offer its first meal (sence the molt). BTW these things are FAST.
spooky