READ THIS COMMENT! My spudger tip also broke off :(

I opened mine with a hairdryer that I have from my house that I bought from 2005... I just rotated it uniformally, after 30 seconds I tried opening it with the Flex tool thingy and it didn't budge, did it again for 30 more seconds and was able to open it relatively easily. First time ever doing a repair btw.

Be EXTREMELY careful doing step 10. The tiny piece broke off and now the headphones are paperweight. Use the lightest amount of force possible when doing that step

It's a shame I didn't read this guy's comment... I broke my unit permanently because of this stupid step. It's EXTREMELY fragile. Be VERY careful when doing this step