The Russians solved that problem by visiting a water planet and attaching their laundry to the inner ring of the stargate, then dialing inactive addresses for about 45 minutes. Walter should've done the same, taking time to visit the cafeteria for some delicious Fruit Loops or porridge.
One thing I wish the show would've had more fun with was alien foods and Earth foods, with our people reacting to new spices and dishes and visitors commenting on various things we make, perhaps swapping ingredients (herbs and food crops) and recipes as part of a cultural exchange. Then you'd have people in Area 51 whose job is pretending they discovered some new spice on an expedition to the Amazon rain forest or the African Congo. Meanwhile people like the Tolan would be negotiating for the Colonel's secret recipe for KFC.