I have just noticed this problem also. my mom said that it did not do it there at there home. so if you find out how to remove this can you let me know i am moving our furniture. i can't tell if there is any on the couch or not. but i am moving it. my email address is fai2703 AT aol.com i have spam filter, and check it often. also wanted to tell you i bought some spray carpet cleaner you spray on the stain, then vacume when dry. it helped but not as much as i wanted. there is more on the wall also but don't know what to do with that.
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