First, don't panic.
My understanding is it's mostly the more acidic fruits, the citruses. Lemons, oranges, and such. I know blueberry and banana are fine. Especially blueberry. I'm nuts for blueberry.

I've vaped tons of blueberry in all kinds of combinations and never had a problem. Haven't found a cherry I like (though cherries are second only to blueberries with me) but the ones I've tried didn't hurt the clearo.
Do watch out for cinnamon. Particularly "hot" versions. Like this one:
Fire & Ice. I love the stuff. Could not get a coil head for my one all metal clearos (one of the polar vortex storms delayed every shipment that passed through Dallas, the biggest hub we got). So I bought a cheap CE-4 so I wouldn't risk my EVODs or CE5s (or 4+ or whatever they call 'em this week, nobody seems to agree on which is which

). The poor thing literally fell apart in about a day and half. So, yeah, "hot" anything, I'd use glass or metal.
I've seen some say wintergreen is risky but I "all day vape" wintergreen frequently. I've had no trouble. Same with spearmint.
Oh yeah, lately I've become fond of kiwi. No problems so far.
Anything acidic or "hot" seems risky with polycarbonate. But non-citrus fruit? I'm coming up on a year with this vape thing and I haven't had a problem. And I'm a fairly heavy vaper. I average about 6ml a day. A clearo wrecking juice is gonna show itself fairly fast. Like that poor little CE4.