I don't have depression (I think I don't have anyway) and I'm rather 'numb' most of the time, but I did have a lot of negative thoughts and all, and I've been eying the cleaning products for quite a while. And I got these kind of thoughts when I'm showering or washing dishes XD .
I don't really have the thoughts on the cleaning products for a long time except for when I'm really don't feel like worth living sometime (this sound a lot more bad than what actually happened XD ).
When I feel really down and stuff, my face would usually become blank and I will be thinking about a lot of 'stuff' until that bad feeling go away. But sometimes I cried when no one is around.
And for whoever that have to gone through the pain of the depression, I don't know what you're feeling or what you've gone through, but hang on mate. Someone, somewhere, is really care for you. Don't just give up yet. Live a full and happy awesome life do you could shows life a big D on its face for throwing his lemons to you. (I'm also trying to tell myself this XP )
Love you all, and keep strong. 