How do you check them and how often ?

Checking them is a bit of a mission really

It can be very stressful for your Crestie and shouldn't be done very often. I would suggest annually. Or if you suspect a calcium deficiency then just check them.

If you are able to hold your Crestie and tease him into opening him mouth with some live food then thats great if not then it's the hard way......

You have to be confident when handling your Crestie. You need to find a way to hold him so that you are not hurting him but at the same time he can't escape your grip. With your other hand you need to try and get your Crestie to open its mouth nice and wide, then have a look. Healthy calcium sacs should be a white/cream colour and be nice and plump. There is two on the roof of the mouth. I will post a pic in a minute.

It's not that easy to do but once you have done it a few times you will have worked out a way which works.

If you have a female who is laying eggs then really you need to check at the at some point during the breeding season as laying eggs uses a lot of calcium and this is when a deficiency is most likely to occur.

Here are some healthy calcium sacs:

do you have any recommended method on getting their mouth open besides teasing them with food? i've heard that rubbing the side of the mouth works but i cant seem to get my female's mouth open. and i do not want to force it open.

I find a wax worm normally does the trick when it comes to teasing their mouth open. This has always worked for me so I can't really suggest any other way of making them open their mouth.

what i do is a put my thumb and pointer finger on each side of the mouth, then push up with my pointer and down with my thumb. both me and my gecko DO NOT like it but its the easiest way.

yeah ouch for them, thanks but no thanks. and i would try the wax worms if my gecko liked them >.< i actually tried putting cgd on the end of a q-tip cotton end cut off given and just put some on the top of her snout. when she tried licking it off, i quicky snuck the q-tip in the long way and got a quick glimpse. i believe i'm the first person to ever try it on her because she quickly turned her head and got out of the q-tip scenario. but i'll try again tomorrow and see if i can get her to stay so i can see. i hope this helps out anybody else!