I have been collecting ties, but haven't got enough to really get into a project yet (am still deciding). I have however washed them. As mentioned ties can get pretty revolting and as I sourced them from charity stores and from deceased relatives some were pretty "whiffy". I just handwashed in a bucket, rinsed several times (once with vinegar) and air dried. I then unpicked them and have stored them together 'til I decide what to do. Will keep watching for ideas/inspiration.