Tip 1
Match four pieces of soap to create a bottle with a special purple liquid. It will automatically match soap in a particular pattern. Place two bottles next to each other to make a rainbow bottle that has more power. The explosion pattern of the bottle can be determined by its markings. A "+" indicates that it will explode in a "plus" pattern, while a horizontal or vertical line indicates explosions in those directions.

Tip 2
Many levels require you to match a specific type of soap. The top right corner shows which ones must be matched, and how many are remaining. During such levels, ignore other types of soaps unless they will create an easy bottle or something else useful. Save all of your moves for matching the most important soaps.

Tip 3
Remaining moves after completing a level's objective will result in random soap pieces being transformed into bottles.