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KMBS Lifespan & Lambrusco Grapes

Q I have a question about sanitizing. I just mixed a fresh batch of potassium metabisulfite (1.5 oz. powder to 1 gallon water) to sanitize my equipment, and this latest batch has very little smell. Until now, every batch I’ve made has smelled quite powerful. I know that you’re supposed to replace the liquid when it loses its smell and that the solution will lose its strength over time. Will the dry powder also lose its strength over time? I purchased this sulfite powder six months ago, and I used this new solution to start a new kit, but now I’m wondering if it’s okay to use. Dan Harazim East Hampton, Connecticut A You’re right to suspect that both the potassium metabisulfite powder and solution can lose their power over time. The solution, which you make by mixing the powder with water, is particularly unstable. All that antioxidant power we love means that when it comes in contact with air, which it usually does in a storage container (despite our efforts to prevent this), it’s getting oxidized. This means that