Try using a 1/32nd drill bit to bore out a larger air hole where they already exist. Looks like there are three air holes on the knurled base. Do one, try it, if not enough, do another one. Repeat as necessary. If still not enough after three (but you notice an improvement, then go to a larger bit size). If you make it too loose, you can always break a toothpick off it the hole and cut it flush.
Why does mine only have two? Could there be just a little consistency?? I am not drilling anything, don't even think about it!!

No wonder I get behind!