Have just bought our first ever slow cooker, with the aim of chucking stuff in before we go to work and it being ready when we get home. however all the recipes I can find seem to be for about 6-8 hours at the most - we're out of the house for 10-12 hours per day, so I'm not sure what to do... do you have to add more liquid, or are there only certain recipes you can do for that long? I'm normally a confident cook but I'm completely flummoxed by slow cookers!