I was not sleeping due to what seemed like allergies, with coughing and sneezing. I sometimes felt a tickling in my throat and swollen and clogged nostrils. I went to the doctor several times, but it didn’t help much. Then I saw a show on t. v. about dust mites. I got in touch with hygienitech. Before cleaning the bed, they did a test that showed the extent of allergen producing particles on the mattress; it was very high. My bed was cleaned, and to this day, I have not had a problem with my sinuses or tickling throat.