yes i contacted them and they sent me new ones. i had every color.. i have not used them much since then.. i sent most of them into a spring clean up swap because i bought all new markers after those dried out. they told me they needed to be stored laying down not upright.
I had the same problem and contacted the company. They did send me some new ones with directions to store them laying down. I was storing them in a ped holder on my desk, now I'm storing them in a drawer laying down. I haven't had any problems since.
I have also learned the hard way. Storing the pens with caps up makes the ink go down the felt inside and so when you use it the next time, it seems to have dried up. So its really safe to store it flat or down so that ink stays on the tip.