ScentTECH detection dogs are extremely reliable in finding contraband or scent leading to contraband. There is no better method in the drug industry to detect the presence of illegal drugs than a detection dog. Records for ScentTECH dog teams indicate that they consistently perform with a proficiency of greater than 95% when tested in blind exercises. If we find your area clean, it simply means that it was clean of drugs or residue the day of the search.