I'm conscious of a faint smell in my living room - I'm not sure what it is (but we have a dog and a toddler...) - I think ds has spilt a little bit of milk somewhere - not enough to create a big stink but enough for there to be a bit of a taint iykwim. So I want to give the carpet and sofa a good clean. What can I use that isn't full of chemicals? Obviously ds spends a lot of time on both sofa and floor and I don't want him breathing lots of chemicals in, plus I'm pregnant so want to avoid them for that reason (so I'm thinking nothing along the lines of shake 'n' vac). Any suggestions of more natural products I can use?