Editor’s Tips: Drop the side Bombs first to avoid the situation in the Pic at your right hand.
Pic EI 22-5a: Black bubbles are at top in white triangle. Three bombs, one on each side and middle circled green. There are infection bubbles above not seen that will run down each side. Try to drop middle bomb first. You will ignite at least one bomb. Watch your clusters closely to make sure not touching bomb or could lead to chain reaction. Drop other bombs one at a time if possible. Shoot up sides of black bubbles to contain infection. Clear under as well. If colors right will be able to drop bombs.
Pic 22-5b: Remaining infection seen as well as ceiling and black bubbles. Work up sides and top to drop infection and drop ceiling.