@Adeline Submitted by Teoh Yi Chie on April 28, 2018 - 1:13am @Adeline There could be some leakage of air. Try disassemble the pen and fill water to see if there are any leakage. reply
@Adeline
There could be some leakage of air.
Try disassemble the pen and fill water to see if there are any leakage.