NO, there wasn't. It was a suggestion put forward by Mike along with a bucket full of blood as opposed to a bucket of water coloured by bloodied underwear soaking in it.
I do however think the suggestion put forward that a tampon was used to clean the moderator to be extremely plausible.
And Bamber accidentally left behind the one cardboard tube, instead of taking it away with him - though of course he could have flushed the rest down the Toilet