Yes, it really is a problem. And using distilled water won't help as chloride ions are naturally in saliva (http://books.google.com/books?id=LKy0weDEFp8C&pg=PA6

Yes, it really is a problem. And using distilled water won't help as chloride ions are naturally in saliva (http://books.google.com/books?id=LKy0weDEFp8C&pg=PA601&lpg=PA601&dq=saliva+chloride+ion+concentration&source=bl&ots=4_ofFA4K7K&sig=fB_8fANm0q-ZwuJJ3xV_OqTmbZc&hl=en&sa=X&ei=6xnpU_mWDbG-sQTgo4DgBA&ved=0CCwQ6AEwAg#v=onepage&q=saliva%20chloride%20ion%20concentration&f=false http://books.google.com/books?id=LKy0weDEFp8C&pg=PA601&lpg=P...).