<qa>  What is the reason smokers are exposed to smoking cues?However, relapse rates remain high even in quitters on the patch. It is thought that cravings related to smoking cues contribute to relapse in smokers on the patch who try to quit. Rational treatment approaches for nicotine dependence therefore include strategies to weaken the effect of smoking cues, e.g. cue extinction training CET. During CET smokers are repeatedly exposed to smoking cues, in the absence of nicotine administration, and smokers report lessening of cue-induced craving extinction. It is thought that the extinction of smoking cues will result in less control of the smoking cue over smoking behavior and lower relapse rates. 