True. Don't mess with this stuff and wear eye and skin protection. But it does not dissolve the salts out of your eyes; it dissolves fats and oils (hence Drano dissolving the oils in your PVC piping and properties of bases and acids). I am not in chemistry, but Honor's Physical Science with Mr. Gearren sure beats the heck out of it. I'm not even to chemistry, and I'm building hydrocarbons, mole-mole equations, and complex chemical equations.
If you get drano somewhere, pour acetic acid (vinegar) on it.
(H)C2H3O2 + Na(OH) --> NaC2H3O2 + H2O
Chemical equations sure are fun
Also, just taking a ring of some sort to trap the Drano and something to catch the product would help the chemical reaction along.