This is a simple nozzle cleaner for the ender 3 pro, it uses Bambu labs P1S and A1 nozzle cleaner you will also need a M3 screw or use the screw that comes with the P1S nozzle cleaner you will also need to move the lcd display one screw hole over to make move for the attachment. print in ABS because its so close to the bed but petg will be okay if you only print with pla bed temps 

G1 X239 Y0 Z6.5 F5000

G1 X241 Y40 E0 F5000

G1 X239 Y0 E0 F5000

G1 X241 Y40 E0 F5000

G1 X239 Y0 E0 F5000

G1 X241 Y40 E0 F5000

G1 X239 Y0 E0 F5000

G1 X241 Y40 E0 F5000

G1 X239 Y0 E0 F5000

G1 X241 Y40 EO F5000

I use the start g code in Cura for the wipe action after the nozzle is heated you may need to adjust you X,Y,Z and extend the printer X axis from 235mm to 245mm I used Marlin firmware services custom firmware