Oh yes, I tried citric acid, but I find it takes away from the scent when the lather blooms, and it only takes me a few seconds to walk into the kitchen and fill my mug with warm water from the dispenser.You can achieve something similar by adding citric acid to your water used for lathering. Lemon juice contains citric acid and can be used, or you can purchase citric acid in powered form from the canning section of your grocery store.