This week, I worked on my seed stitch swatch (again), using the combination knitting style suggested by Divine Bird and my Dear Friend Jen.
I’m unhappy. It’s still got holes. (Also, it is kind of sloppy where I was adjusting to the new-and-awkward-to-me technique.) *sigh* I am going to try knitting up yet another swatch, using my preferred knitting method (continental), and see if wet blocking (as Marlene suggested) doesn’t help it. Wish me luck!
Knitting Interrupted 
Aww, I’m sorry the technique didn’t work for you! I wonder if trying it continental will help. Good luck!!
Don’t forget to give it a good tug! And if you’re allowed to wash and block, DO IT! I really think that will do the trick for you.
Fingers crossed.
Can you use a different yarn? A woolen spun yarn will fluff up and fill holes much better than a smoother yarn will.