During the seder, are you really not supposed have any charoset left on your maror when you eat it? Why is this? When do people actually get to eat the charoset?
For moror we are not supose to sweeten it with charoses hance the minhag of shaking of the charoses after diping the moror into it but you may have some charoses on the the moror.
As for Korech that dependes if you are carefull about gebrokes (not allowing any water to come into contact with your Matzah then the wine and water in the charosas will make your Korach gebrokes that is why those who are carfull about gebrokes wil make sure not to allow any charoses to remain on the moror and come into contact with the matzah.
When one eats the marror, he is obligated to dip it into charoses and then to shake off the charoses before eating it. If the charoses remains on the marror, it would give off its sweet taste to the marror that is supposed to be bitter (Shulchan Aruch 475:1).
When one eats the korech, the Shulchan Aruch (ibid.) rules that one must follow the same procedure. However, the Rema (ibid.) notes that the custom is not to do so. Today, though, the general custom is to use charoses at korech as well (see Aruch HaShulchan 475:8, Mishnah Berurah 475:19). While the Beis Yosef rules that one does not need to remove the charoses for the korech (see Kaf HaChaim 475:32), many poskim do require the charoses to be removed before eating the korech (Kitzur Shulchan Aruch 119:7, Mishnah Berurah 475:17). If one is careful about gebrochts, he should ensure that the charoses that he uses is dry and that it is removed before the marror comes in contact with the matzo (Siddur HaRav).
It is the custom in Belz to eat the leftover charoses at the Yom Tov daytime meals.