Anemone's Stickiness

Over Christmas, I set up an auto-feeder and visited my parents. When I returned, my anemone lost all of it's tentacles. I assumed it was starving and it started to eat it's own tentacles. Over the past couple of months, I've been nursing it back to health and his tentacles are around 1" now; however, it is still not grabbing on to food. How long does it usually take for an anemone to recover completely from something like this? When will it's "stickiness" come back?
 
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