Well without knowing what your system and internet connection are?
You can try this, it works for most.
I use a different browser, just for this game, and only for this game. I tried 2, chrome, and comodo dragon. Comodo won, so its set up just for this game, and when the meter starts to get jittery, I clear the caches from the browser, and the flash and it gets better again. And its easy to do both from the options menu in the browser.
So you can try it and see if it helps. Seems that it works for about 70% of the people that try it, the other 30% still seem to have the problem.
Give it a try, and good luck.