After cleansing, dead oily skin sorta rubbed off, it was sticky, didn't come off easy. Looked kind like that thick tretinoin cream mixed with skin.?

It could be. I am not sure i completely understand your question but, from your description, if you are exfoliating and using tretinoin crew, simultaneously, it is possible that the two have become mixed.
Foam wash. Use a foam wash especially made for acne type skin to use for cleansing your skin.