Did you click on the head in the inventory first? You can't drag the bolt onto the head's small icon. I don't mean having Rooter on the left of the screen. I mean having his head in the left section of the inventory. Here's how you should drag:
Did you click on the head in the inventory first? You can't drag the bolt onto the head's small icon. I don't mean having Rooter on the left of the screen. I mean having his head in the left section of the inventory. Here's how you should drag: