@TwinOaks : Thank you, next time will not mix those products. You're right maybe cloth wasn't good decision, i will try damp sponge as you wrote and as well the whole procedure.
One problem is that here in Slovakia (Middle Europe) are not any shops specialized in leather working, so it's pretty hard to buy professional dyes, finishes etc. I'm ordering it from Germany or Britain but shipping cost me more then actual products :/ But leather working gets being my passion so I will save some money to get right products
@NVLeatherWorx : Thank you I would like to use sheep wool, I saw it in some videos and working with it looks great, but i'm not sure where to get it. Here in Slovakia probably just from some farmers. As I wrote probably using dry cloth was a big mistake. I regret that I didn't come here for advice from you experts, before dyeing it. Your advice really help me, also next time I will be more patient and let it dry at least for 24 hours. This were my first amrguards, before that I also tried to create belt but I ended with same critical problem - dyeing.
Thank you both, again I'm glad that here are people willing to help newbies as me.