I have an apple wine on the go right now that was taking forever to clear on its own, so I tried various clarification methods such as pectic enzyme, bentonite, isinglass and dropping the temperature to about 2 degrees Celsius all to no avail. So I tried a combination of gelatin and kieselsol which cleared the wine almost completely within 48 hours. It doesn't seem to have considerably altered the aroma or flavour, either. I'm letting it sit for another week or two before racking off in order to let it clear completely. Definitely worth a try!!!