Question
Hi Sarracenia Northwest,

Strangely the tentacle curling has "disappeared" I checked this morning and the leaves are now normal!The temperature is around 60f-84f.The cause could be that I was spraying  imidacloprid on my plants and some of it went on my sundew like as if i was applying fertillizer.I'll let you know next time it happens.And Thanks Again!!!

Answer
Hi Jason,

That would do it.  Spraying anything on sundew leaves can make them roll their tentacles inward.  It's really, really, really, really, really, really, important to tell me details like that when submitting your questions to avoid a reject.  I would have known what was up immediately.  From your description it sounded like a leaf under-curling that can occur from lack of light, or from a soil pest attacking roots.

Good Growing!

Jeff Dallas
Sarracenia Northwest
http://www.cobraplant.com