how do i clean the inside water lines? my ice tastes like plastic or old water

Diagnosis

The "plastic" or "stale" taste in your hOmeLabs HME010019N ice maker is typically caused by a combination of biofilm accumulation and mineral scaling within the internal reservoir and the narrow tubing leading to the evaporator plate. Because this unit uses a small internal pump to move water, a thin layer of organic slime (biofilm) can develop on the interior walls of the plastic lines if the machine isn't flushed regularly. This biofilm traps odors and tastes, which are then frozen directly into the ice cubes. Additionally, if you are using tap water, calcium and magnesium deposits build up on the evaporator pins. These minerals act like a sponge, absorbing odors from the surrounding plastic chassis and releasing them into the ice. You can confirm this by inspecting the evaporator plate; if you see a white, chalky residue or a slippery film on the bottom of the water reservoir, your internal lines are contaminated and require a chemical deep-clean rather than a simple rinse.

How to Fix It

To thoroughly sanitize the internal lines and remove the plastic taste, follow this deep-cleaning protocol:

1. Empty the water reservoir completely and remove any existing ice from the basket.
2. Mix a solution of 1 part distilled white vinegar to 3 parts warm filtered water. Pour approximately 1 liter of this solution into the reservoir.
3. Activate the self-cleaning mode by pressing and holding the Power button for 3 seconds until the indicator light flashes. This engages the internal pump to circulate the solution through the lines.
4. Crucially, do not let the cycle finish immediately. Once the pump has filled the evaporator plate, unplug the machine and let the vinegar solution soak the internal components for 45 to 60 minutes. This breaks down the mineral bonds that a quick cycle cannot touch.
5. Plug the machine back in and allow the full cleaning cycle to complete its duration.
6. Drain the reservoir completely by tipping the machine forward or using a sponge to remove all remaining vinegar solution.
7. Fill the reservoir with fresh, distilled water and run two complete ice-making cycles. Discard these batches of ice entirely; do not consume them, as they may contain residual vinegar.

If That Didn't Work

• Switch to a commercial descaler. If vinegar is too weak for heavy calcium buildup, use a food-grade citric acid solution. Mix 2 tablespoons of citric acid powder into 1 liter of warm water and repeat the soaking process described above. This is significantly more effective at removing the "old water" taste caused by hard water minerals.
• Perform a manual reservoir scrub. Use a soft-bristled bottle brush and a mild dish soap to scrub the corners of the water tank. Biofilm often hides in the seams where the tank meets the pump intake, which the automated cleaning cycle cannot reach.
• Replace your water source. If the plastic taste persists, the issue may be the reaction between your local tap water chemistry and the machine's plastic tubing. Switch to bottled or reverse-osmosis (RO) water for two weeks to determine if the taste is environmental or mechanical.
• Deep-clean the ice basket and lid. Sometimes the taste isn't in the lines but is absorbed by the plastic ice bin. Wash the bin with a mixture of baking soda and water to neutralize odors, then air dry completely before reinserting.

Heads Up

• Avoid using bleach or harsh chemical cleaners in the HME010019N, as these can degrade the silicone seals and permanently warp the plastic tubing, leading to leaks.
• To prevent future odors, empty the water reservoir every 48 hours if the machine is not in active use; stagnant water is the primary cause of biofilm growth.
• Always use filtered water to reduce the frequency of descaling cycles and extend the life of the internal pump.
• Ensure the unit is placed in a well-ventilated area; overheating can cause the plastic components to off-gas, contributing to a chemical taste in the ice.