I'm totally prejudiced as I work at a local typewriter repair shop in Bremerton, Washington. We also have a space where we sell them. In general if the local shop has a bunch of machines that you can put on a table to try out, that is good. If they don't want you futzing with the typewriters, I'm not sure the value. Do they have a warranty? If not, then stick to the internet and local antique shops and buy as low as you can. At least that way when you need repair you have a cost buffer.

We use three ultrasonic cleaners in the shop. The two smaller ones we bought on eBay. One is small for screws, springs and such. The slightly larger one is for small to medium size machines, carriages and other long stuff. The large cleaner is a commercial item used mostly for Selectrics.

Yep, some times hard to tell from the listings. Look for the inside dimensions of the unit. We have a three gallon (screws and small bits), 13 gallon (carriages and dunking half a typewriter) and a gargantuan gallon for Selectric machines.

We switched to Ultra 3 detergent after using Dawn detergent for years. A quantum leap in effectiveness. When we got the new Ultra 2100 cabinet ultrasonic unit it came with a gallon of detergent. We used it ONE TIME and the parts came out so much cleaner, almost brand new. The detergent is expensive, yet we've never gone back.

We are often asked what ultrasonic cleaners we use in the shop. We have three. The large cabinet model that holds large typewriters such as Selectrics, a medium sized 12"X20", and a smaller cleaner 10"X12". The medium and smaller ones you can buy on eBay all day. The models change, and the sizes are all similar. The medium sized cleaner is used for small to medium sized typewriters and the small machine is mostly for nuts, screws and other tiny stuff.

At our shop we know that we'll age out. Everyone does. To seed the typewriter field we have a 12 week apprentice training program. Hopefully a few get the repair mojo and open up their own shop. Or just become more adept at the hobby. I can only hope once the time comes we have someone willing.

Paul Lundy, who runs Bremerton Office Machine Company, a typewriter repair business in Seattle.