求翻译：通常使用的清洗剂为中性不含水柴油或煤油，根据需要有时也使用温性碱液等。不论用哪种清洗剂，都要经常过滤保持清洁。是什么意思？

Neutral cleaning agent is not commonly used by water-diesel or kerosene, temperature sometimes use lye as needed. No matter what kind of cleaning agent, is often filtered to keep clean.