I stopped using Surolan. I switched instead to MalAcetic HC. It's an over the counter ear cleaning solution that is medicated. Its not bad cost wise and worked quite well. It can be purchased through vet offices.
"He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion."