Question Consistently clean the inside of your windows if anyone has been smoking because: Answers Smoking causes a film to build up on the glass inside your vehicle. Dust tends to settle on the insides of car windows. The stale smell can be distracting. Explanation Keep the inside of your windows clean, especially if anyone has been smoking in the vehicle. Smoking causes a film to build up on the glass. Pass your DMV Written Test with flying colors Take me to the cheat sheet Delaware This questions appears in the following tests: Delaware Practice Test 25 Delaware Practice Test 7