Last winter I ran out of rock salt during an ice storm. The stores were sold out — apparently everyone else had the same idea at the same time. My driveway was a skating rink. I had to get to work.

I stood in the garage staring at the ice, then at my shelves, then back at the ice. That’s when I spotted the bag of water softener salt. Same stuff. Different label. Half the price.

What melts ice besides rock salt

Anything that lowers the freezing point of water works. Table salt works — it’s just finer than rock salt. Water softener salt pellets work — they’re literally the same chemical, sodium chloride, just sold in bigger bags for less money.

Calcium chloride (the stuff in DampRid and some ice melts) works down to -25°F. Regular salt stops working around 15°F. If it’s truly frigid, you need calcium chloride.

The DIY solution that surprised me

Mix one part rubbing alcohol, two parts water, and a squirt of dish soap in a spray bottle. Spray it on thin ice. The alcohol lowers the freezing point. The soap helps it spread instead of beading up.

This won’t handle a half-inch sheet of ice. But for walkway frost and thin ice patches, it’s faster than standing there with a salt shaker.

The hot water method and when to use it

Boiling water melts ice instantly. The problem: if the air is below freezing, the water re-freezes within minutes into a smoother, more dangerous sheet. Don’t use hot water alone.

The fix: pour boiling water, then immediately sprinkle sand or kitty litter on the wet area. The sand provides traction. The residual heat gets absorbed into the concrete and keeps melting for longer than you’d expect.

I do this for the front steps. Pour, sprinkle, walk away. Safe by the time I come back with my coffee.

What damages your driveway

Rock salt eats concrete over time. The freeze-thaw cycle forces salt crystals into the pores of the concrete, where they expand and crack it from the inside. If you have a newer driveway (under two years old), use sand instead of salt. Salt can ruin uncured concrete in a single season.

Also: salt runoff kills plants along the edges of your driveway. If you have landscaping you care about, shovel first, salt only what’s left, and only where people walk.

Prevention is faster than melting

Spray your driveway with a brine solution (salt dissolved in water) before a storm. It prevents ice from bonding to the surface. Snow and ice slide off with a shovel instead of freezing solid.

One pre-treatment beats an hour of chipping ice afterward. I learned this from a neighbor with a perfectly clear driveway while mine looked like a glacier.