It is not possible to get through level 55 if you do not see beyond the skull bubbles and the row of infected bubbles. It is therefor essential to try to stop the infection before it spreads to low underneath the skull bubbles. The infection you will have to deal with by your own, but we have a great cheat for people that do not want to purchase the Charm of scrolling!
Here is the legit cheat for all of you that are stuck on level 55:
Use the Print Screen Key! This Admin successfully used it and managed to get through. (With three stars actually!) As soon as you load level 55, you take a Print Screen and paste it in to Paint. Here is what to do, straight from Microsoft, Windows;
You can take a picture of what is on your screen by pressing PRINT SCREEN (PRTSC or PRTSCN on some keyboards). You can then paste the screen capture into Paint. Note! Some keyboards or mobile PCs that don’t have the PRINT SCREEN button might use other keyboard combinations, such as FN+INSERT, to take a screen capture.
Recommended screenshot addon for Chrome; https://chrome.google.com/webstore/detail/awesome-screenshot-captur/alelhddbbhepgpmgidjdcjakblofbmce?hl=en