This guide covers routine care for Smartool slush (frozen drink) machines: the daily clean, weekly deep maintenance and long-term storage. Your machine’s manual takes priority wherever it gives different steps or intervals.

Which Smartool models this covers

Model	Supply listed on the product page	Maintenance-related features listed on the product page
RL18-3 (3 × 16.5 L)	AC 120 V / 60 Hz	One-touch cleaning, microchannel condenser with 24 V DC fan, motor speed, current overload and compressor overload protection; rated for rooms of 10–32 °C (50–90 °F)
RL18-2 (2 × 4.7 gal)	110 V / 60 Hz	Removable drip tray (0.2 gal) with a red warning button that pops up when the tray is full, seal rings in the tanks against cylinder and drain-tube leaks
RLC18-1 (16.5 L)	AC 120 V / 60 Hz	One-touch cleaning, removable drip tray (0.2 gal) with red warning button, motor speed, current overload and compressor overload protection; rated for rooms of 10–32 °C (50–90 °F)

How often to clean

The FDA Food Code 2022, § 4-602.11(E)(4), ties cleaning of beverage dispensing nozzles and enclosed equipment parts to the frequency the manufacturer specifies, or, where the manufacturer is silent, to a frequency that keeps soil and mold from building up. Follow your machine’s operation manual and your local health department; our support team can share model-specific cleaning instructions on request. The routine below assumes a full clean after each use or at the end of each day, which is the practical baseline for sugar-based drinks.

1. Daily Cleaning (After each use or before closing each day)

This is the most basic and essential step to prevent residue buildup, bacterial growth and cross-contamination.

Disassemble

• Drain the tank and empty the drip tray. On the RL18-2 and RLC18-1, the red warning button pops up when the drip tray is full.
• Remove the tank (hopper), the dispensing valve (tap) and the agitator.

Wash the parts

• Wash all removed parts with warm water and a food-grade neutral detergent.
• Use a soft cloth or sponge. Avoid steel wool and other hard items; scratches create spots where residue and bacteria collect.
• Pay special attention to the inside and crevices of the dispensing valve, where syrup builds up and hardens.
• Rinse thoroughly with clean water so no detergent remains.

Clean the exterior

• Wipe the casing, lid and control panel with a clean, damp cloth.
• For stubborn stains, apply a little neutral cleaner, then wipe it off with a clean damp cloth and dry.
• Never splash or hose the machine body with water; it can cause an electrical short circuit.

Clean and sanitize inside

1. Fill the tank with warm water (about 40–50 °C / 104–122 °F) and a small amount of neutral detergent.
2. Run the agitator empty for 1–2 minutes to clean the inner wall and the shaft. On the RL18-3 and RLC18-1, use the one-touch cleaning function for this step as described in the manual.
3. Drain, then repeat with clean water 1–2 times until the drained water runs clear.
4. Add food-grade sanitizer diluted to its label. Run the machine for about a minute, and at least as long as the contact time on the sanitizer label, so the solution reaches all food-contact surfaces, then drain. Rinse only if the sanitizer label calls for it. Hot water from the tap is not a substitute for a sanitizer.

Dry

• Air-dry all parts in a well-ventilated area, or dry them with a clean, lint-free cloth.
• Keeping parts dry helps prevent bacterial growth and corrosion.

2. Weekly / Regular Deep Maintenance

Do a deeper check weekly or every two weeks, depending on how hard the machine works, to catch wear that the daily clean does not.

Agitator and freezing cylinder

• Check the agitator for wear, deformation or looseness. A worn agitator reduces cooling and mixing efficiency.
• Remove anything tangled around the agitator.

Seals

• Check the seals at the tank connection, the dispensing valve and the tank seal rings for aging, cracks or deformation.
• Replace damaged seals promptly; they cause leaks and reduce cooling efficiency.

Condenser (crucial)

The condenser sheds the heat the machine pulls out of the drink. The RL18-3 page lists a microchannel condenser with a 24 V DC fan. Dust and grease on the condenser cause poor heat dissipation, higher compressor load, weaker cooling, higher energy use and, over time, compressor damage.

• Disconnect the power.
• Remove surface dust with a soft brush, then vacuum it away.
• For heavy grease, use a dedicated condenser cleaner as its label directs, then let it dry before restoring power.
• Do not bend or damage the fins.

3. Seasonal or Long-Term Storage

If the machine will be out of use for an extended period (for example, more than one month, such as over winter):

• Clean: Complete the daily clean and the deep maintenance.
• Drain: Remove all leftover product from the tanks.
• Dry: Make sure the interior and all parts are completely dry.
• Lubricate: Apply a small amount of food-grade lubricant to the agitator shaft and seals, as your manual specifies, to keep the rubber from aging.
• Store: Keep the machine in a dry, well-ventilated, dust-free place under a dust cover.

When to call for service

If the machine stops forming slush, leaks or shuts down, see Slush Machine Troubleshooting. Alarm codes and service intervals differ by model and are listed in the operation manual that ships with your machine. If you need the manual for your Smartool model or help reading a code, contact our support team and we’ll send the documentation and walk you through it. For a step-by-step cleaning routine with a log, see how to clean a slush machine.