Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4220059.
This simple hotend fix for your Creality Ender 3, CR-10 or just about any Creality Printer is based on Luke Hatfield design. I created a thicker washer and explain how to install it in this video: https://youtu.be/7tCxO17XZtw
Update 6/22/2020: I added a 3mm and 2mm thick washer to the files for those that find the 4mm I used in the video is too thick. They print fast so you could print all three and see which works best for your setup.
I printed in PLA as the top of the Hot End should never get hot enough to soften or melt PLA.