I had an issue last year where my brakes were taking a lot of effort and after some testing figured was the master cylinder.

I replaced it with a new one, bench bleeding that one and trying to get as much air as I could out of the lines.

Well that did not work and I took it I would need to do a proper bleeding. This week I have been trying to do so and today did the back and front tires though the sponginess is still the same.

I may be bleeding the lines wrong. I had to do it on an incline since my truck is in my driveway but now its on the street so maybe can try again tomorrow.

Also I used 1/4 line in a bottle of fluid as one man bleeder but can air enter from the bleeder itself back in? Do I need to make sure the entire clear tube is filled with fluid before I consider all the air out?