Welcome aboard Tooboocoo!
I use a small crochet hook, the butt end of the handle. Its aluminum and holds the heat better making it easier to keep the plastic its dipped into viable for a milli-second longer while I dot the section of the mold with the color of plastic the dots are to be on the finished bait. I have a couple of said hooks each of a different diameter. The larger of the two likes to get warm in repeated uses so I have a small area wrapped with masking tape to create a "handle".
I tried the wood dowel trick but the metal hooks work better simply because the hot plastic stays workable longer. The butt end of a drill bit would work equally wee as would a nail of the size you want. An aluminum knitting needle would work great and even new they are pretty affordable, as are the crochet hooks.
