Help with condom method

So i have been lurking around for years and read quite a bit about all of the tips and tricks that help with the journey.

I have an sgx and mgx and through trial and error found a few things that work and things that dont.

I feel every time i am about to pass over into a super o or maybe just a mini o, i find that is about the time the lube runs out.

maybe its just me but i try to relax and forget about it, trying to get back towards the edge, i cant seem to do it, and when i pull out the aneros it feels kind of dry.

nothing like it felt when i put it in all lubed up.

I have tried several lubes but nothing seems to work so i figured i would try the condom method.

The first time i tied a knot that came loose and lost most of the lube and movement was restricted
so on try 2 i put a tight rubber band around it the condom and p-tab
which worked well but i still found that most of the lube was around the bottom of the aneros
it filled up the condom around the p-tab and i feel maybe restricted movement.

so a few ?'s
how much is the proper amount of lube in the condom?
should i tie it off at the bottom of the main shaft, ie on the last ridge?
and is how i feel about the lube running dry possible or just a figment of my imagination preventing me from progressing?

Thanks all!
btw i am currently using AstroGlide but have tried many others.

-E