Finally, there's only a little time left in the year. The year-end deep cleaning is an important ritual to remove a year's worth of dirt and welcome the New Year refreshed. The dirt in water areas, especially the bath, toilet, and kitchen, can be tough.

For those wondering, "Which detergent should I use for efficient cleaning?" We've carefully selected and introduce the strongest detergents that are sure to be a big hit for your 2025 year-end deep cleaning, categorized by area!

1.Efficient bathroom cleaning! The best items for water stains and mold

The main enemies in the bathroom are water stains from soap scum and mold from humidity. To effectively remove these two major problems, the rule of thumb is to use "acidic" and "chlorine-based" detergents.

1-1."Acidic" is best for water stains: Ultra Hard Cleaner (Rinrei)

The white, scaly water stains stubbornly adhering to mirrors and around faucets are alkaline stains formed by minerals in tap water. Acidic detergents are most effective against these.

In particular, "Rinrei Ultra Hard Cleaner for Bath," known for its professional-grade cleaning power, dissolves stubborn water stains and leaves surfaces sparkling clean. Since it's a strong detergent, always ventilate and wear rubber gloves when using it.

1-2."Chlorine-based" is essential for mold: Kabi Killer (Johnson)

For black mold that takes root in gaskets and tile grout, nothing beats chlorine-based mold removers like Kabi Killer. Just spray and let it sit, and its bleaching effect will eliminate the mold's roots.

💡Absolutely essential precautions: If chlorine-based detergents and acidic detergents are mixed, toxic gas will be generated, which is extremely dangerous. If you clean mold and water stains on the same day, allow time between tasks and always rinse thoroughly with water before proceeding to the next step.  

2. God-tier items to eliminate yellowing and black stains in toilets 

The most concerning issue in toilet cleaning is the ring stains inside the bowl (yellowing and blackening). These are caused by urine scale and bacteria, and the basic approach is to physically scrub them off with acidic or highly viscous detergents.

2-1.Countermeasures for urine scale and ring stains: Sanポール (Kincho)

Since urine scale, which causes yellowing, is an alkaline stain, acidic detergents are effective here too.

2-2.Shorten daily cleaning time: Flushable Toilet Brush (Johnson)

After removing stubborn stains, if you make a habit of quickly cleaning daily with a disposable and hygienic "Scrubbing Bubbles Flushable Toilet Brush," your year-end deep cleaning will be much easier.

3.🍳Conquer grease and burnt-on stains in the kitchen!

The formidable adversaries you'll encounter in the kitchen are the sticky grease stains around the stove and the greasy interior of the range hood. Since these are acidic stains, it is effective to neutralize and break them down with an alkaline detergent.

3-1.Strongest for range hood grease: Magiclean (Kao)

For grease stains on range hoods and around stoves, Magiclean, a powerful alkaline detergent, is a classic choice. After spraying, cover the area with kitchen paper or plastic wrap in a "wet pack" to prevent the detergent from evaporating and allow it to penetrate, making the stains easier to lift.

3-2.Environmentally friendly versatile helper: Sesquicarbonate soda

For those who prefer to use fewer chemicals or for light grease stains, "sesquicarbonate soda" is recommended. Dissolve it in water and put it in a spray bottle to create a highly safe all-purpose alkaline detergent that can be used for daily wiping.

4. Keys to a successful year-end deep clean: proper detergent use and safety management

The secrets to a successful 2025 year-end deep cleaning are "using the right detergent for the type of dirt" and "thorough safety management."

In particular, absolutely avoid the aforementioned "do not mix" warning (mixing chlorine-based and acidic products). With the right knowledge and tools, year-end deep cleaning is nothing to fear. Make use of the strongest detergents we introduced to welcome a refreshing New Year!