Dropper style paint bottles

[Quickdraw]

Hey MBS community. I have a question about dropper paint bottles. I generally prefer citadel paints and I happen to like the paint pot style. But I recently bought a dropper of army painter to match the basecoat on my Ottomans. Every time I use the thing the top is covered in gunked up paint. I can't keep it clean, and it actually seems to gush out when I open it. Sort of like a bottle of soap when you travel up in altitude.
Anyone have any ideas why this is? Do all dropper bottles do this? Any thoughts on how to stop this problem?

[Creon]

Use a paper towel to clean the goop around the dispenser.  Then use a pair of pliers to take the nipple off, runa  toothpick through it to clear caked up paint, and then it should work reliably.

[Quickdraw]

Great tip! I'll give it a try.

[Landlubber]

I use MSP and Vallejo dropper bottles (you can get both at the Haven) and haven't had that problem but just a few times, but yeah, I second what Creon said. Also helps to have a pin hand to run down the dropper to clear out any dried chunks.