Slush Doctor

Fix my slush

Slush gone wrong? Answer a few quick questions and get one clear fix — the same guided troubleshooter built into the Slushable app, running right here.

Slush DoctorStep 1

What's wrong with your slush?

Choose the texture that feels closest.

The three things that break a slush

Almost every bad batch comes down to sugar, temperature, or alcohol. Here’s what’s really happening — and where to go deeper.

Too runny, never freezes

Usually too much sugar or alcohol holding the freeze point down — or it simply hasn't run long enough yet. The Doctor walks you through cold water vs. a colder setting vs. more time.

Watery slush fixes

Frozen solid or icy

Too little sugar, or the machine running too cold. The fix is a notch warmer, or cooled syrup / a sugary cold drink to soften crunchy ice — never dry sugar straight in.

Machine setup checklist

Alcohol throwing it off

Spirits are antifreeze: a little softens a hard batch, too much keeps it liquid forever. Balance sugar against alcohol so a home machine can still freeze it.

Alcohol adjustment guide

Fix it yourself, or call for repair?

Texture problems are a mix or temperature problem, and you can fix every one of them at the counter. Noises, leaks, and power faults are the machine itself — those are worth stopping for.

Ingredient and temperature problems (fix at home)

Mechanical symptoms (stop and check before running again)

Safe to keep running?

For texture problems — watery, icy, uneven, too sweet — keep it running. The machine is fine and the batch usually recovers once the mix is back in range.

Switch it off at the wall and unplug it if you see liquid at the base, smell burning or anything electrical, trip a breaker, or hear the motor hum without the auger turning. Do not open the unit. Contact the manufacturer under warranty instead — a slush machine repair is not a home job once power or refrigerant is involved.

All troubleshooting and repair guides

FAQ

Slush troubleshooting questions

It's the same guided troubleshooter built into the Slushable iOS app. You answer a few quick questions about the texture, whether the batch contains alcohol, how long it's been running, and how cold the machine is set. Each answer narrows it down to one clear, safe fix — add cold water, add cooled syrup, add a little chilled alcohol, change the machine temperature, or simply let it run longer.

Sugar and alcohol both lower the freezing point. Too much of either — or a batch that simply hasn't run for 40 minutes yet — keeps it slushy-liquid. The Doctor checks run time first, then whether the mix is overpowering or syrupy, then the machine setting, before suggesting cold water or a colder dial.

A rock-hard or icy/grainy batch is usually low on sugar or running too cold. First try moving the machine one notch warmer and letting it soften. If it's under-sweet, stir in cooled simple syrup, fruit syrup, juice, or a regular (non-diet) sugary drink — never dry sugar, which won't dissolve.

No. The Slush Doctor runs right here in your browser, free, with no sign-up. The Slushable iOS app adds recipe-aware diagnosis (it reads your batch's sugar and alcohol balance), saved recipes, and a calculator that builds a batch guaranteed to slush.

Ready to make it slushable?

Get the iPhone app, balance the batch in minutes, and stop guessing at sugar, booze, and dilution.

Perfect my first batch

Free on the App Store — the official app by Really Nice.

Recipes that freeze reliably

Start with a proven mix: these are balanced to the slush zone, so the machine does the rest.

Browse all 206 recipes