Amongst the second hand smoking tests, these tests are quite easy to use. Non-invasive urine strip tests are reasonably fast, accurate & can detect exposure to second hand smoke along with active usage of cigarettes, pipes, cigars etc. Such tests measure the levels of cotinine, a byproduct of the body’s breakdown of nicotine which is an active ingredient found in tobacco products and tobacco smoke. Cotinine is a widely accepted indicator of recent tobacco product use and exposure, including second hand smoke exposure.