How do you clean a mod when Boss says it needs cleaning, but it says it doesn't have any dirty ITM or UDR?

And I also have a problem cleaning the unofficial patch for Battlehorn castle. It says it has 5 dirty ITM, and whenever I apply filter to it, it becomes highlighted in red, and I can't clean it for some reason.

i think boss does that because it doesnt know all the ITM or UDR involved with the mod but knows it needs cleaning

BOSS doesn't "know" anything - it only tells you what the devs have written in the code. If a mod has a "dirty" message but nothing else, it means that no one knows the CRC, ITM, or UDR information.

As for BHC - check http://cs.elderscrolls.com/constwiki/index.php/TES4Edit_Cleaning_Guide#BattlehornCastleEnhanced.esp_Special_Cleaning_Instructions.

Thanks for that link. In the link, it says BattlehornedEnhanced.esp. Is that the correct one? I'm talking about the unofficial patch for it.

So, I can't clean them then?

Oh, oops. Hmm. I'd go over to http://www.gamesas.com/index.php?/topic/1200914-list-tes4edit-cleaning-list/page__hl__tes4edit (it's the TES4Edit cleaning thread) and ask there - someone who's more knowledgeable than I can answer you. There aren't any special issues noted, so I'm not sure why it doesn't work for you.

Most probably the mod was updated since someone put that message in the Masterlist, and the newer version is cleaned.