Answer: The sweat works like a dye (i.e. yellow) and once the perspiration gets into the fiber it has now dyed that fiber. If the perspiration does not get into the fiber, the Dry Cleaners can clean it out. PristineCollars puts a protective barrier on the fiber preventing the perspiration from dying the fiber.
Answer: Yes, you can use PristineCollars on other areas of the shirt (i.e. pockets, underarms, cuffs). When spraying the underarm area, be sure to spray onto the inside of the shirt.
Answer: Each time the shirt is dry cleaned or laundered.
Answer: Wipe dirt and dust off of the collar. Test on inconspicuous small area. Aim can 4 inches from collar and apply a generous amount of this product to the area to be treated and spread evenly. Allow collar to air dry at room temperature.
Answer: Depends on the fabric, but usually about 30 minutes.