Hi i have bought a house with an aqualisia shower i believe it is a quartz digital, it was fine at first but recently when you stop the shower it runs on for a few seconds and the drips continually after that. its at a slow rate about 1 drip every 5 seconds but its just anoying. sometimes if it hasn't been used for a while when you start the shower the pump runs but doesnt deliver the water (like it needs priming) when you lower the shower head it kicks in and starts pumping! its too old to justify getting the technicians in and i understand aqualisia don't make it easy to replace parts yourself. any ideas?