Few keys periodically not working.

My Apple wireless keyboard acts very strangely sometimes, and I can’t figure out if it’s a software problem or a hardware. The issue began with the numerical keys 1,2,3, and 4, and now has spread to 5 and 6. These keys work sometimes for a period flawlessly when I turn off the bluetooth and on, reset smc, plug in a drive in the usb, things like that, and sometimes they don’t. I tried resetting the keyboard to factory settings (big mistake, almost cried when I couldn’t log back in), and just about every other trick that google showed me. Would the elders please help? It’s really getting on my nerves and I can’t keep opening “Show keyboard viewer” and click the keys i want all the time. I don’t have an issue with any other key, they all work fine.