Inventory tape device = tape clean cycle?

If setting the cleaning slot definition does not fix it

In BE 2012 (and I assume in BE 2014 as well - the only reason I am quoting 2012 is my tape library is on 2012, not 2014 so this is where I checked the behaviour), if you go to the Storage screen and open up the details of the slots object in the library, and then go to slots tab on left side of dialog, all your slots will be listed.

You can multi-select in this screen (using Shift or CTRL) and then you can right click to bring up a menu with "Inventory now" as one of the options that gives you a sub-choice of Schedule (as well as Inventory now)

As such you should be able to create a selection without the cleaning tape slot selected. BTW still define that slot as cleaning as BE needs to know for BE to run an actual cleaning job.