If changing pillows every summer is beyond your means, most pillows can be washed in a standard washer with no ill effect (unless they are feather!). Anti Allergen pillows don't really make much difference.

If you have a good powerful vaccuum cleaner (Dysons work really well for this), then give your pillows and mattress and other soft furnishings a good vaccuuming each week - it helps a lot!

LTS