The reason these things stick is due to water being absorbed into the plastic causing it to swell I think what you are doing with the heat gun is evaporating the water so it reverts back to its original size . All this is far to much faffing about playing with heat guns etc in this country if we get a problem we phone Alex up and he sends out a replacement free of charge I think they have slightly altered the manufacturing tolerances so it happens a lot less now
So appears that never listen to video or might of not watch it at all.
First thing we did was have template female quick lock.
Heated it as seen in video then put in vice tightened to about a 1mm then have vice grip pliers to do same .
Let cool off for about 10 minutes.
So this is what you put your male quick locks in after you heat them as shown in video.
End result is you have a male quick lock that goes in/out no sticking or jamming ever.
When set up you can do as many male quick locks as you need.
So if you using say 10 poles to do this many might take about 15 minutes NO FAFFING AROUND.
But if you happy to put up with these sticking or jamming.
Then buy more where it might do the same thing.
It’s your money you throwing away.