Is Dead Skin Normal After Getting a FUE Hair Transplant?

[sb591]

Will be 3 weeks since the surgery tomorrow (Tuesday)

After I shower I see a lot of what looks like dead skin around the transplanted area.
I believe that it is the skin that was tranplanted with the grafts.

I started to lightly rub them when i shampooed with my finger tips.
I saw hairs coming out as well as some white skin.

I know that it is normal for the hair to fall out and that most (if not all) will fall out and then new hair will start to grow in a few months.

I believe that grafts should be 100 % safe now and I can start scrubing harder to remove the dead skin.

Is it normal to have this dead skin after a fue or did i not shampoo well?
Am i good to scrub harder to remove the dead skin?

Thank you.