Quick answer: Turn off and unplug the portable ice maker, remove and drain the side tank using the model instructions, and disconnect any hose near a sink or bucket. Hand-wash the tank, cap, rubber valve, and approved base parts with warm water and mild dish soap. Rinse until no suds or scent remain, dry accessible surfaces, and reconnect the hose securely. Do not put the tank in a dishwasher unless the manual explicitly permits it.
A side tank is a small water system, not just a pitcher
The accessory may include a cap, spring or rubber valve, base, and a hose that feeds the main reservoir. Film can collect where water sits, especially at threads and flexible seals. Cleaning only the broad tank walls can leave residue in the parts that regulate flow.
Designs differ. Some tanks lift from a base; others connect directly. Photograph the assembled setup before moving anything and keep small seals in a shallow bowl so they do not disappear down the drain.
Drain before you disconnect
Switch the machine off and unplug it. Empty finished ice and follow the manual's draining order. Put a bucket or sink below the hose because many countertop systems drain by gravity. Release connectors by their tabs or collars rather than pulling the tube itself.
If the tank is full and cannot be removed without spilling into the appliance, stop and consult the model instructions. Water entering controls or vents turns routine cleaning into a service question.
Hand-wash each approved removable part
- Separate the tank, cap, valve, and removable base pieces shown in the manual.
- Wash with warm water and a small amount of mild dish soap.
- Use a soft bottle brush on broad surfaces and a soft detail brush around threads.
- Flex a removable rubber valve only as needed to expose its water-contact surfaces.
- Rinse repeatedly, then drain and air-dry where dust cannot settle inside.
Do not send components through a dishwasher simply because they are clear plastic. Heat can distort the tank or valve, changing how it seals. Avoid abrasive pads and solvents. For the main machine, use the model-specific cycle rather than improvising with the side-tank method.
Treat mineral deposits differently from ordinary film
| What you see | What it suggests | Response |
|---|---|---|
| Slippery clear film | Standing-water residue | Wash, rinse, dry, and shorten storage time |
| White crust | Mineral deposit | Use only the manual-approved descaling mixture |
| Persistent odor | Residue in valve, hose, or main reservoir | Stop ice production and clean the complete approved water path |
| Cracked valve or leaking seam | Part damage | Replace the model-specific component |
Do not mix descaler, bleach, soap, or other cleaners. A manufacturer may prescribe different products for washing, descaling, and sanitizing, followed by specific rinse cycles. Our humidifier tank guide explains the same distinction between mineral scale and routine water-reservoir film.
Reconnect and verify before making usable ice
Check that every gasket lies flat, the cap threads start straight, and the hose is fully seated. Refill only with potable water approved for the unit. Watch the base and connection during the first fill. If the manufacturer calls for rinsing cycles or discarding initial ice after cleaning, complete that step before serving ice.
A leaking valve, cloudy water after repeated rinsing, or debris that cannot be reached calls for replacement or support. For another small water-contact component, see our water-bottle gasket routine.
Bottom line
Clean the side tank as an assembly of water-contact parts: drain safely, hand-wash what the manual identifies, rinse more than once, dry, reconnect, and inspect for leaks. The main ice maker's cleaning cycle is a separate job.
Storage deserves its own rinse-and-dry plan
Before a long break, drain both the side tank and the machine using the manual's storage procedure. Water left in a valve pocket or hose can develop odor even when the broad tank looks empty. Prop removable parts so air reaches the interior, but do not stuff a towel into the neck where fibers may remain.
When bringing the unit back into service, inspect the flexible valve for sticking, verify the hose is not cloudy or cracked, and run every required rinse or cleaning cycle before making usable ice. Do not rely on freezing to sanitize an unclean water path. If the tank was stored with visible growth, a persistent odor, or unknown liquid, ask the manufacturer whether the component should be replaced.
Sources
- GE Appliances — Opal Ice Maker Side Tank Cleaning and Care
- GE Appliances — Opal Ice Maker Cleaning and Descaling
Editorial image generated for Gohall with OpenAI ImageGen; it illustrates the maintenance context and is not a product test. Reviewed by the Gohall Clean Team on September 10, 2026.