Hi. Apparently what they are losing are the stems. It is not necessary to change all the taps. These can be replaced or repaired. To change them, simply remove one sample and take it to a hardware store. To repair them (they don't always look good because of excessive wear) you just have to replace the uo rings. If you want to try before changing them, remove one and take it to the hardware store to sell the parts. They are very cheap. Regards