[akira700]

It always takes me much longer than I think it will.

Be patient it will come true after much work.
Try the wrap the brake lever to the grip
method, then tap all places you think air will trap and let it sit overnight.
Then when you return tap again and bleed again...

I find it takes me a couple days of work to get it really firm.
If I find myself wasting alot of fluid. I use a clean container
and just pour it right back down after it comes out. But dont give it
much time to absorb moisture.

I have heard of those who fill it from the bottom having success
but for this you'll need an industrial type syringe and some clear tubing.