DustMite & Flea Control 8oz

I experienced horrible days & nights since 2 years. These insects where so irritating that I had sleepless nights. This only use to bother me at home and initially I was not knowing about such insects. When l use to tell about this to my people they told me it may be some internal body problem. But I was sure it was external. These used to bite on my left side portion of lips, enter my nose, eyes & hair. This made me so irritative one will never realise or understand what I was facing through. This insect normally was multiplying and spreading into my clothes and mattress . So I tried many ways to get rid of it but it was all in vain.I got dissappointed.One more thing I noticed was it used to come on my face and never allow me to work on my mobile or tab with my specks. I tried vaccum cleaner ,used neem oil, Nilgiri oil ,pesticides and many more things for treatment nothing worked. I searched on google about this finally and came to know this as DustMites. Then I searched treatment for it . Came across few products. After going through review for these products I thought I will try and ordered for them. And after 2 to 3 times of spraying noticed the difference.I do not know how long I should use these to get rid of them totally or I have to continue to spray life long to maintain it.Kindly reply if one has the answer to my question.