DerbyBorn wrote on 17/02/2018 :


or squeeze bottle whilst pumping.

You would think so, but no - squeezing only worked whilst squeezing -
my guess the vacuum created in the container, broke the priming as air
was drawn back in. As soon as I stopped, the pump stopped working. I
did rather expect that they would have an air vent to allow air in, as
the liquid was expelled, but again no - the pump top/cap seemed to
provide an airtight seal. I only had two versions to work with, but the
fix worked with both.