Vinyl seat covers are better than cloth for keeping dust and mould away from the seat upholstery. Whenever possible, travel in an air-conditioned car, so you can keep the windows closed. In spring and fall, when the air is full of allergens like pollens, keep the windows and air vents closed and recirculate the interior air. If your car is not air conditioned, cover the vents with cheesecloth, to help filter out these allergens. Avoid breathing in chemical pollutants as much as possible, because they may aggravate any allergic conditions and increase your symptoms.
Some drugs can cause oral problems.
For example, antihistamines, antidepressants, diuretics and antihypertensives can cause dry mouth. Also, women going through menopause often develop oral problems. If you're having problems with your mouth but none of these explanations apply to you, it's probably time to talk to your dentist. In the meantime, you can reduce mouth irritation by avoiding alcohol, smoking and spicy foods. To relieve a dry mouth, try sucking on sugar-free candies or ice chips, or mix a few drops of lemon juice in water, to stimulate saliva.