This turns into a globby mess. You have to press so hard to try to get the glue out that you end up with a big blob of glue. It's like a strawberry that gets stuck in your straw from a milkshake. I haven't tried making the holes bigger yet. I got discouraged when I had the same problem with 8 of the colors and put the whole thing in a plastic bin. The flow starts out nice and the colors are great but after about an inch, you get a back up and nothing comes out. Very disappointing.