The Bunn 1188-0000 Deliming Spring is a maintenance tool used to remove mineral deposits from the water tube of compatible BUNN coffee brewers. As calcium and lime scale build up over time, water flow can become restricted, leading to slower brew cycles and inconsistent brewing performance. Regular use of the de-liming spring helps keep the water tube clear and the brewer operating efficiently. However, the de-liming spring itself can develop problems such as mineral buildup, bent coils, corrosion...