anywho, from what ive found out on here theres a number of things to watch out for as goes:
are buds forming new pistols and layers if so you could leave her a little bit longer.
are your main fans leaves yellow and dieing off ?
does she drink as much as she would during first stages of bloom if so could drag it out a bit longer.
also depending on strain it may not even show amber trichs so trichs will only go milky.
also muddy has informed me that uv light also has somthing to play with trichs going amber so it may be because you dont have such a powerful light that it will not go into amber.
because the trichs will go amber under uv light to try protect the goodness i think, but they will start to degrade eventually