Persistent clogging

Greetings,

I come here for I’m desperate. I have used this particular printer in my company for around two years, and, before that, I worked with the standard Ender 3 and CR-10 series for around four years. Last month, it started non-stop clogging, I did all the usual troubleshooting (change nozzles, change filament, make sure the filament is new, clean the extruder, levelling, cleaning the hotend and so on). I got to the conclusion that the hotend could be the issue, so I got a new one and the same keeps happening, also tried everything I tried before with the new hotend. I want advice on what I could be missing, since I tried everything I knew of and lots of things I saw on youtube and forums. This is my third hotend, I changed it once before and managed to work perfectly for a full year.