The fenwicks chain cleaning sponge the best ideas are sometimes the simplest fenwickrsquos tough new chain cleaning sponge was conceived as a way of applying even pressure to all sides of a chain for rapid cleaning with minimal mess best used on a chain prepared with fenwickrsquos foaming chain cleaner the sponge also washes clean very easily with fs 1fs 10 when yoursquore finished fenwicks chain cleaning sponge features best used on a chain prepared with fenwickrsquos foaming c