Everyone has their good and bad days when it comes to experiences, and you might just be having a bad time with them right now. Wait it out and see if anything changes. There's also the possibility for things to get better without you pushing it.
Additionally, with spirit experiences, in my own life and happenings, they remind me a lot of memories and dreams. Mostly in the way that sometimes it's very hard to remember them regardless of what I think about myself and my own abilities.
And you say that you write down all of your experiences? This is good, it's actually a method of practice to help remember dreams more often and in greater detail and I wouldn't be at all surprised if it helps you keep clearer memories and thoughts on the spirits you're encountering. Don't stress over it too much and keep doing what you're doing.