If you don't need it in a long time ,clean it with methanol:D.I water 30:70 ,then wash with methanol .If you always use it ,I think only use water is OK.
qiwenss发表:If you don't need it in a long time ,clean it with methanol:D.I water 30:70 ,then wash with methanol .If you always use it ,I think only use water is OK.