Wipe your nozzle on a piece of PTFE tubing

 

You will need (BOM):

• 1x M2x15 screw
• 3x M3x12 screw
• 2x profile T Nut
• 1x M3 heat insert

 

Here is my macro that works for me. You will need to fine tune this for your own printer. I go down to Z=-0.3. Because people might not read what they copy and paste, I modified it to Z=1.3 below, to hopefully save your build plate.

 

[gcode_macro NOZZLE_CLEAN] gcode: G1 F18000 ; set reasonable fast feedrate G1 X212 Y300 Z10 ; go to hover above start position G1 Z1.3; -0.3 ; lower nozzle [[ADJUST DOWN IF THE REST IS RIGHT]] ; do the wiggling G1 X192 G1 X212 G1 X192 G1 X212 G1 X192 ; raise nozzle G1 Z10

The same Idea is discussed here, but its for a 2.4.