Remove, change, hot end Nozzle

[mbay]

Has anyone that does not work for Geeetech ever successfully changed one of the brass nozzles on the 2-1 hot end?
I've read through and watched every video available and all i see are dozens of people like myself, who are knowledgeable mechanically and follow all the instructions, yet still cannot get the nozzle to budge before the threads ultimately break off and ruin the whole assembly. 3 of 3 assemblies i've purchased do not disassemble.