I shoot mine frequently and remove the bolt every time I clean. open the lever to about 90*, remove the one screw at the pivot, pull the lever straight out from the bottom, put gun on side with ejection port up. Bolt slides out the back. Take note of how the ejector is sitting loose in its channel in the receiver.
Reassembly is straightforward with no tricks, provided the ejector hasn't popped out unnoticed; if it did, just put it back. You'll want to take it out to wipe down the internals anyways.
These guns work themselves loose, so give all the screws a twist to make sure they're tight.