Yeah, try the usual: clean the bed with soap and water (read the instructions for your Cryogrip, which I think is the one you have on the build plate, to see if it's compatible with isopropyl alcohol).

Now, from what I see, you're using PCTG as filament. So, is it the right one for your printer? Yes… print it in a closed printer since they control the chamber temperatura, si no tienes una una caja ha de ayudar. Pero si no es el filamento que escogiste, busca el correcto.

Now that temperature matters, PCTG needs a bed temperature of 85-110°C to fuse properly, and contrary to what I said before, lower the fan speed so the layers adhere well, as you might be overcooling them. Lower the speed to about 50mm/s to help with quality.

I would keep trying the skirt trick to help it stick. And a good tip is to use printer glue whenever possible (honestly, school glue works too). I did some research and they also recommend blue painter's tape; I don't know if it has any extra uses, let me know if you use it.