@burcinc-- I just use my finger to remove them but I realize this doesn't work for everyone, especially if there are crypts.
Whatever you use, make sure the end of the tool is blunt. Don't make your tonsils bleed or you will get an infection. I gargle with warm salt water often to kill bacteria and prevent infection when I'm removing tonsil stones.
I would actually prefer to have the dentist remove them but I get them almost every month so it's not possible. But if you don't get them all the time, it's safest to have your dentist take care of it for you.