Spongy clutch lever?

[the cueball]

I am currently trying to sort my clutch, the biting point of which gets closer and closer to the bars as the engine gets hotter. I have been reading up on this problem and have seen quite a few references to a "spongy clutch lever". Now I can see how you can tell when you have a spongy brake, but how on earth do you tell if your clutch lever has a spongy feel to it? Just wondering.

If it's fine when cold but get worse as the bike gets warmer or stuck in hot town/slow riding then I think you need to rebuild the master cylinder.. it's the seals within there that is the issue - known as clutch fade on here I believe.