how do you actually clean the water lines in this thing? the manual just says 'clean regularly' but mine has gross pink slime.

Diagnosis

The "pink slime" you are seeing in your Euhomy IM-02 is a biofilm caused by *Serratia marcescens*, an airborne bacterium that thrives in moist, low-nutrient environments. Because the IM-02 uses a small internal pump to push water up into the freezing molds, stagnant water often clings to the interior tubing and the corners of the reservoir. Over time, these bacteria create a protective polysaccharide matrix (the slime) that shields them from basic rinsing, allowing the colony to grow deep inside the internal lines where a sponge cannot reach. You can confirm the extent of the contamination by filling the reservoir with warm water and a drop of dish soap, then running a cycle. If the resulting ice cubes have pink streaks or the water draining back into the reservoir contains floating pink filaments, the biofilm has colonized the internal delivery tubes and the pump assembly. If left untreated, this biofilm can clog the narrow apertures of the ice molds, leading to irregularly shaped cubes or a complete failure of the water pump.

How to Fix It

To fully eradicate the biofilm and sanitize the internal plumbing of the IM-02, you need a chemical shock treatment rather than a simple rinse. Follow these exact steps:

1. Prepare the Sanitizing Solution: Mix 1 tablespoon of unscented liquid chlorine bleach (5.25%–8.25% concentration) into 1 gallon of distilled water. Do not use concentrated bleach or scented versions, as the fragrance can permeate the plastic and affect the taste of future ice.
2. Fill and Soak: Fill the water reservoir to the "MAX" line with the solution. Let the machine sit idle for 30 minutes. This allows the bleach to penetrate the biofilm clinging to the walls of the reservoir and the intake valve.
3. The Shock Cycle: Press the "ON/OFF" button and select the "Small" ice size setting. This ensures the pump works at a specific pressure to push the solution through the narrowest parts of the internal lines. Allow the machine to complete at least two full freeze-and-drop cycles.
4. Internal Wipe-down: While the machine is running the cycle, use a microfiber cloth dipped in the bleach solution to scrub the ice basket and the area where the ice drops. Pay special attention to the seams where the plastic housing meets the cooling elements.
5. The Triple Flush: Discard all "bleach ice" immediately. Fill the reservoir with fresh, filtered water and run three consecutive full cycles. This is critical to remove any residual chlorine smell or chemical taste from the internal tubing.

If That Didn't Work

If the pink slime returns within a week or persists after the bleach treatment, try these advanced methods:

• White Vinegar Acid Shock: Some biofilms are resistant to bleach but susceptible to acidity. Fill the reservoir with a 50/50 mix of distilled white vinegar and warm water. Run two full cycles. The acetic acid breaks down the mineral scale that often "anchors" the biofilm to the plastic walls. Follow this with a fresh water flush.
• Citric Acid Deep Clean: Mix 2 tablespoons of food-grade citric acid powder into 1 liter of warm water. This is more aggressive than vinegar and is particularly effective if you have hard water buildup (white crust) accompanying the pink slime, as the slime often feeds on the mineral deposits.
• Physical Reservoir Scrub: Remove the ice basket and use a long-handled bottle brush or a pipe cleaner to scrub the very bottom corners of the water reservoir. Biofilm often hides in the "dead zones" where the pump intake is located, preventing the cleaning solution from fully circulating.

Heads Up

• Use Distilled Water: To prevent the recurrence of biofilm and mineral buildup, switch from tap water to distilled or reverse osmosis water. This removes the nutrients the bacteria need to grow.
• Dry the Unit: If you are not using the machine for more than 48 hours, empty the reservoir completely and leave the lid open to air dry. Bacteria cannot survive in a completely dry environment.
• Weekly Maintenance: Perform a "mini-flush" every 7 days using a mixture of water and a small amount of white vinegar to keep the internal lines slick and free of organic buildup.
• Avoid Harsh Chemicals: Never use abrasive scrubbing pads or industrial solvents inside the reservoir, as scratches in the plastic create microscopic "caves" where bacteria can hide and grow even faster.