How do I unequip an item after the player uses it?

[doctorhibert]

So after the player uses an item on a hotspot I want the item to go back into the inventory, not for it to still be selected as usual. How do I do this? player.activeinventory is the item the player has in hand, but I don't know how to make the activeinventory none.

I'm using the BASS template, by the way

[dayowlron]

Correct me if I am wrong but something like:
player.ActiveInventory=null;