Printer Setup, Software & Drivers

All of my HP printers have disappeared from the HP Smart (stupid) app.  I use multiple offices for work, and I have (had) many printers installed, and they have all disappeared.  This would commonly be 8610, 8710, and I think I also have a 7710 but can't remember, it's the newest one.

When I go into the app, they are all gone.  The only printer showing up is some laserjet that I think I added once to print something at a library.  Everything else is gone.  When I try to add a new printer, it doesn't find anything on the network, even though they are on, and connected.  Have I tried resetting the printers yet to see if they appear?  No, and I won't.

The solution is probably going to be, delete the HP app, reinstall, probably go into some setting somewhere to delete the printer from the system, clear some cache/data somewhere, and re-install again.

What I'm actually going to do, is delete the app, and go buy a new printer for the house.  I don't believe this to be an issue with my computer, because I have another brand printer at another office, and it is working great.  The only other office that I really use now that still has an HP, I won't be traveling to as much in the future, and I just won't print anything while I'm there.  I've already tried diagnosing issues with that printer with HP tech support on the phone for HOURS, that went unresolved.  Any time I print more than one page, it prints a black line down one side of the page, however it won't do this if I print in low quality/draft mode, I tested this with Word and Adobe with consistent results.  Tech support had me print out about a reams worth of diagnostic pages, and it was never resolved. 

I have used probably 1-2 dozen HP printers over our various office through the years, and EVERY. SINGLE. ONE. has caused issues, either with not printing, not connecting, not being found, unable to install, or printing weird black lines down a page on normal quality prints. I've had this discussion with the leaders at work, and we are using a different brand at any of the new offices that I'm in the process of opening.  So far, they work fine, every time.