It's taken me years to realize it but the main source of my allergies has actually been my house itself. I noticed that often while outside they were considerably better. But I was so tired from the allergies it was hard for me to get out more. Then I changed my air filter and it was chalk full of dust and mold and quite moist. It only cost 1.19 per filter and now I do it once a month. On top of this often when my air kicks out I take a homemade misting solution of 30 drops of essential oils (it's always good to include a purifying oil something like eucalyptus), a dab of rubbing alcohol or vodka, and water and spray it over the vents. This purifies the air and has helped immensely. I noticed a huge difference by repeating these activities alone. Also allergies are also a part of an immune system problem so alkalizing the body on top of this is a good idea. Barley greens is an excellent supplement for such purposes. So far so good. A little sneeze and blow of my nose here and there but, nowhere close to where it used to be.