sometimes it's easy sometimes it's not

[Pranaman]

sometimes i'll be circulating in my microcosmic orbit, and I'll notice that i've been circulating energy slightly outside of my chest. I also when I bring energy down to the sexual center, it's hard for me to contain it deep within the center, it's usually on the skin and an inch out. For now i'll just keep trying to go deep, sometimes it's easy, sometimes it's not, yesterday was one of easiest times i've had with it, but today, it was very difficult. any suggestion?