finding solutions to everyday problems

Ash is in charge of drawing up the weekly shopping list, working his way through the cupboards as he does it and writing down what's missing.  For the past 3 weeks he has added floor cleaner to the list and each week I've told him that we have several bottles already.  He has then opened the cupboard under the sink (where it has never been kept) and shown me that there isn't any.  This is followed by me going to the cupboard where we do keep it and showing him all the bottles stored there.  This week we went through the usual process but after showing him we had them I moved them so that the floor cleaner now lives in the cupboard under the sink.  I still can't quite believe how many weeks it took me to come up with this solution.  As I said a few days ago, I'm learning ...... but very, very slowly.