» Sat Mar 22, 2014 8:31 am
When you go into sneak mode, the crosshairs are replaced by either two straight lines or an eye, which is either wide open if someone can see or hear you, or more or less closed if someone is looking for you but can't quite find you. If you're picking a lock, you need to wait until the eye is replaced by the two lines, i.e. it's closed/you're undetected.
If you try sneaking but the guard always detects you, then try going there in the daytime, wander in, pretend you're just looking around, find the thing you need and sneak, hopefully you should be able to grab it undetected. Best to save before you take it, just in case.