我的衣服上有一块很顽固的污渍，你有什么办法可以清除吗？
旧老血渍，可用硫黄皂揉搓清洗。[{'character': '旧', 'pinyin': 'jiou4', 'highest pitch': 11.3, 'lowest pitch': 9.29, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '老', 'pinyin': 'lao3', 'highest pitch': 9.29, 'lowest pitch': 5.53, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '血', 'pinyin': 'xve4', 'highest pitch': 10.14, 'lowest pitch': 5.92, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '渍', 'pinyin': 'zii4', 'highest pitch': 10.08, 'lowest pitch': 7.96, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '可', 'pinyin': 'ke3', 'highest pitch': 8.59, 'lowest pitch': 6.72, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 8.02, 'lowest pitch': 6.79, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '硫', 'pinyin': 'liou2', 'highest pitch': 10.7, 'lowest pitch': 6.94, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '黄', 'pinyin': 'huang2', 'highest pitch': 10.66, 'lowest pitch': 6.57, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '皂', 'pinyin': 'zao4', 'highest pitch': 10.57, 'lowest pitch': 6.75, 'duration': 0.26, 'prosody hierarchy': '#2'}, {'character': '揉', 'pinyin': 'rou2', 'highest pitch': 6.75, 'lowest pitch': 6.2, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '搓', 'pinyin': 'cuo1', 'highest pitch': 8.45, 'lowest pitch': 6.81, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '清', 'pinyin': 'qing1', 'highest pitch': 8.24, 'lowest pitch': 6.81, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '洗', 'pinyin': 'xi3', 'highest pitch': 5.46, 'lowest pitch': 4.27, 'duration': 0.34, 'prosody hierarchy': '#4'}]