The consensus with the corks is "BOIL THEM OR OIL THEM" Well I do both. I put them in a shallow saucepan and boil them for a few minutes then oil them on assembly. You have to squeeze them in till you can get the fitting started in the thread, screw them all the way down a then operate the slide a few times which is usually stiff to start with. Then with the tap in the open position, poke it through to make sure the hole is clear then blow it through with an air line to clear any fragments of cork, which can end up in your main jet. Don't ask me how I know this:persevere: Ron
Here are two spare Enots taps that I just took apart. There's not much to know really.
On assembly the top and bottom fittings are obvious and the wording PUSH ON and PUSH OFF should be the right way up. The bottom fitting has a convex end for the petrol pipe nipple to sit in. The hex end of the tap slider is the PUSH ON end which is easy to remember (hexagON!!)
You can see the remains of the old corks I just dug out and the new corks ready to be boiled and oiled to make them soft and supple. Don't overtighten the fittings as you can crack/split the central part.