Removing "salt stains" from carpets - "Salt" stains are usually caused
by calcium chloride and magnesium chloride, not sodium chloride,
according to Carpet and Rug Professionals. Rock salt has small
amounts of both of these salts imbedded in it. The problem comes with
solubility. Be patient and use numerous "rinse" cycles. The key is
sometimes calcium carbonate forms and this is fairly insoluble.
Use a stiff bristle brush to aggitate area and then try
to vacuum most of the dry residue off before using cool to warm water
and a very small amount of carpet shampoo. Once the cleaning solution
has been applied, allow time for it to dissolve the deposit.
Take a clean white cotton towel or a new Waffle Weave and blot, do
not scrub, the spot. Sodium chloride is more soluble at lower temps
than at higher ones. Then rinse with clear lukewarm water, blotting
up the excess moisture and follow with another water rinse and blot
dry. This should work. If not, try a cleaning mixture of 1/2 white
vinegar to 1/2 lukewarm water, allow to stand 15 minutes and rinse
with clear water.