A Future of OCD?

So Matilda's reaction to her play kitchen has been really good. She has been playing with it tons, displaying lots of creativity. Her favorite activity by far is to "wash" her hands in the sink and then "dry dry" them. I am not sure if we should be concerned, or pleased with her good hygiene habits. Maybe she is just pretending to handle a lot of raw chicken and we haven't picked up on that part yet?