Great video but. . That part of the level is kinda obvious! The first part of the level is what me and suppose others need help to complete! Please upload the complete level for help and tips how to unlock this part that's shows. Cheers!

Bubble Mania lv307, I've only had one attempt at this level,no more lives! Just like many will the babies got sludged! After watching the video above, so u don't get sludged the key to this level (I think!) DO NOT SWITCH THE SWITCHES! The sludge passes the babies without covering them, making it easier to get to the locks! As soon as I try again I'll comment if it worked for me! Good luck x