Walls

• 1). Wear rubber or latex gloves. Spray the wall with a solution of 1/2 cup (4 fl oz/125 ml) chlorine bleach, 1/3 cup (3 fl oz/80 ml) powder laundry detergent and 1 gallon (4 l) hot water, working from the base of the wall up. (Or you can use a commercial mildewcide, though it's much more expensive than mixing your own.)
  
  
• 2). Gently scrub away surface mildew using a plastic scrubber sponge.
  
  
• 3). Using the scrubber sponge, rinse thoroughly with fresh water.
  
  
• 4). Once dry, consider applying a coat of paint containing an antimildew agent so you don't have to do this again any time soon.