Since 1987 the Tobacco Institute Testing Laboratory (TITL) has continued to test most cigarettes, using the Commission's approved methodology; the companies report the results to the Commission pursuant to a compulsory request, and the Commission publishes the results. A saliva test is considered the most sensitive way to detect cotinine, and it can detect it for up to 4 days. Hair testing is a reliable way to figure out long-term use of tobacco products and can be very accurate for as long as 1 to 3 months after you stop using tobacco.