The company I worked for back in 1980 used a combination of dishwasher to handle ex-rental keyboards. And I'm pretty sure we didn't need to remove the keytops.
The trick isn't the cleaning, but the drying -- following it with an arklone bath doesn't get them any cleaner, but it immediately dispels all water and ensures it dries quickly and without residue.
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The company I worked for back in 1980 used a combination of dishwasher to handle ex-rental keyboards. And I'm pretty sure we didn't need to remove the keytops.
The trick isn't the cleaning, but the drying -- following it with an arklone bath doesn't get them any cleaner, but it immediately dispels all water and ensures it dries quickly and without residue.