Keyboard won't go away unless I restart my phone

Answered

I used to be able to make it go away by hitting the mic button. Then i fussed around with a bunch of buttons and sometimes one would make it go, but I'm tired of this! Why is it taking over, and what can I do about it without restarting my phone every time?!

(I assume this is obvious, but below is a screen shot of my home screen with the unruly SwiftKey stubbornly refusing to eff off. )