In fact, this is a very common question, and you’re right – many people don’t know exactly what these compartments in a washing machine are for! Using the compartments correctly helps your clothes get a better wash and your detergents work more effectively.

Let’s take a look at what goes where in your washing machine:

The standard three compartments in a washing machine and what they do:
Typically, you’ll find three compartments, often marked with symbols or numbers. Their location and symbols may vary slightly depending on the manufacturer (e.g. Bosch, Samsung, LG, Indesit, etc.), but the function remains the same.

Pre-wash compartment – usually marked with an “I” or “1” or with the symbol:

Purpose: This compartment is for detergent used during the pre-wash (soak) cycle.
What to put in there:
Prewash powder/gel: Usually a small amount of main detergent, or a special soaking agent (e.g. heavy stain removers).
Bleach (for whites): If you are using liquid bleach (e.g. for whites), you can add it here if your washing machine has a prewash program.
When to use: Use this compartment if your clothes are very dirty, have heavy stains, or need an intensive soak before the main wash. If you are not using a prewash program, this compartment remains empty.
Main Wash compartment – usually marked “II” or “2” or with the symbol:

Purpose: This is the main compartment for detergent used during the main wash cycle.
What to put in there:
Main detergent: The vast majority of the powder or gel you use for your regular wash.
Liquid detergent (gel): This is where you pour liquid gel. Some machines have a special divider or insert for the gel so that it doesn’t leak out right away.
Stain (if not for prewash): Some stain removers that work during the main wash are added here.
When to use: Whenever you wash clothes. This is the most commonly used compartment.
Fabric Softener/Conditioner compartment – usually marked with a flower symbol 🌸 or an asterisk ⭐:

What it is: This compartment is for liquid additives such as fabric softener or fabric softener. Water drains this compartment during the last stage of the wash (during the rinse).
What to put in there:
Fabric softener: Pour the conditioner up to the MAX mark. Do not overfill, otherwise it may leak out prematurely or clog the dispenser.
Rinse aid: You can also add special rinse aids (e.g. antistatic).
When to use: Whenever you want your laundry to be soft, fragrant and easy to iron.
Common mistakes and tips:

Don’t mix up the compartments! If you put the powder for the main wash in the conditioner compartment, it will be washed out immediately at the start of the wash, and not when needed. Conversely, the conditioner will not work properly if it ends up in the powder compartment.
Use a measuring spoon: Always follow the detergent manufacturer’s recommendations for dosage. Too much detergent can leave streaks on the clothes or clog the machine, too little can result in poor washing results.
Clean the detergent drawer regularly: Detergent residue, mold or scale can accumulate in it. Remove it regularly and wash it under running water.
Gel capsules: If you use gel capsules, they are never placed in the compartments. The capsule is placed directly into the drum of the washing machine with the laundry.
I hope these tips will help you use your washing machine more efficiently and get perfectly clean clothes!