My regulator

I was sitting at the table this afternoon and I heard a hissing coming from the living room. I asked Michael if he was leaking oxygen. We noticed that the portable tank was leaking. So we got another tank and tried the regulator on the new tank. We laid the 2nd tank down and after a few minutes it also started hissing. I called the oxygen company and told them the problem. I was told someone would come out and try to fix the problem. The company called back and told us how to trouble shoot. We had already figured out what to try. (I live with a engineer, of course he could figure out how to fix things). I was told to put a new washer on the regulator. I said that would be a great idea, unfortunately, we weren't provided with spare washers! I also asked if they would provide us with a spare key for the tanks. A little after 5PM a gentleman comes out and says he can't reproduce the problem (of course). He replaces the regulator and has Michael show him how to connect the regulator. They discuss how to replace the washer. He leaves us with an extra key and spare washers.
The oxygen man says we should always have spare washers and a spare key. Thanks, I think I figured that out.
Tomorrow the plumber is supposed to come out and fix the connection to the swamp cooler. The high today was in the 90s. Tomorrow a record high is expected, so I hope it will be running tomorrow. It is currently 87 on the main floor of our house! I have a couple fans going. The basement is actually comfortable, lucky for Rebecca. (her room is down there). Michael has been working on the computer and is also hanging out in the basement. I have been literally slaving over a hot stove. Rebecca wanted French onion soup for dinner. She just had oral surgery, so I figured that I would humor her.