Good morning,
Thank you for your message, and we are sorry for these inconveniences.
Due to its 100% natural formula, precipitation can sometimes form in the refills.
Over time, these precipitation can accumulate in the pump, especially in the filter, which can reduce its effectiveness.
In addition, it can sometimes be difficult to clean the pump well due to the large number of parts.
So we have a tip to protect the pump: just filter the refills using a coffee filter before pouring them into the bottle.