The maritime rule has always been nothing you did not eat or drink goes into the head. Many simply do not want to talk about that from marketing, in the office, or on the dock. The less you put in the head the less chance you will have problems on your voyage. Blocked heads or tanks are never fun for anyone.

No two heads or pump set ups are created equal. What may have worked for you on ten visits may not work on the next.

If you did not eat it or drink it avoid trying to force the stuff down the head. The worse, the dental floss King or Queen. DISASTER! If you swallowed it it goes into the head. If you did not swallow it, it goes into a waste bag. Try eating even the best "marine paper".