New colleague transferred to my team has OCD. They arrive and spends circa 15 mins cleaning their desk and equipment in the morning, and again on returning from lunch. I appreciate this is a medical condition, I do sympathise. My query is, should the cleaning be done on colleague's 'own time' or on the 'firms time'. We work flexi hours. I cannot make up my mind - am I being selfish thinking they should do it in their own time. I am conflicted. What do you think?