My nespresso machine started making watery runny coffee lately. I have checked the following: i) Capsules are pierced ii) Water volume has been reset back to factory setting so too much water is not a problem. iii) Took out the capsule tray and checked for any liquid leak during the brewing process - no water leak. Im suspecting the following i) inadequate pressure despite proper seal ii) Need of descaling ANy other suggestions or solutions?