Do you know how to?

Thread or twine wrapped around the end? Is it magnetic or plastic? Are they hollow? Grasping at straws without a picture. Are they like RCA covers?

I had a similar problem with an amp I owned and while this solution might seem like overkill, it worked.

I drilled a small hole in the center of the plastic cap and screwed in an appropriately-sized 'Easy Out' until it had enough grip that I could pull the plug straight out.

You should be able to buy a single Easy Out at any hardware store for a couple of dollars, along with the drill bit to match it.

Thanks Sfar, there has to be a simple and easier way to remove these plastic dust caps. I have a metal dental round hook that dentists use, I may poke a hole on the dust cap, insert it in and fish it out. Wacha think?
On my Focal speakers, I removed the dust caps with me finger nails, but these are, again, totally flushed inside the spkr coonectors...
Grrr, didn't think it could be this frustrated.
Tom6897, I too wish Agon would have a section for us to post pics.