Di dapur, Ayah memakai spons lembut untuk membersihkan teko karena ada sedikit kerak di dasarnya.

Yes. Di dapur sets the scene first: In the kitchen, ...

Indonesian word order is fairly flexible for adverbs of place and time. You could also say:

Ayah memakai spons lembut di dapur untuk membersihkan teko ...

That is still grammatical. Starting with Di dapur just puts the location in focus first.

Indonesian usually does not use articles like English a/an/the.

So:

• dapur can mean kitchen or the kitchen
• spons lembut can mean a soft sponge or the soft sponge
• teko can mean a kettle or the kettle

Context tells you which meaning is intended. If Indonesian wants to be more specific, it can use words like ini or itu:

• teko ini = this kettle
• teko itu = that kettle

Ayah means father or dad. When a kinship word is used like a name or title, it is often capitalized in writing, especially in learner materials and standard writing.

So Ayah here is like saying Dad rather than father.

It can stand alone because Indonesian often uses family terms as direct references without adding my every time. The relationship is understood from context.

Compare:

• Ayah datang. = Dad is coming.
• Ayah saya datang. = My father is coming.

Both are possible, but Ayah alone sounds very natural.

All three can mean to use, but they differ in style.

• pakai = everyday, casual
• memakai = standard and common
• menggunakan = more formal

In this sentence, memakai spons lembut means to use a soft sponge.

You could also say:

• Ayah pakai spons lembut ... = more casual
• Ayah menggunakan spons lembut ... = more formal

Also, memakai can sometimes mean to wear, depending on the object:

• memakai baju = to wear clothes
• memakai spons = to use a sponge

In Indonesian, adjectives usually come after the noun:

• spons lembut = soft sponge
• teko besar = big kettle
• air panas = hot water

So lembut spons would sound wrong.

As for yang, it is not needed here. The simple noun + adjective pattern is normal:

• spons lembut = a soft sponge

You could say spons yang lembut, but that feels more descriptive or slightly more emphatic, like the sponge that is soft or a sponge that is soft. In many ordinary sentences, Indonesian just uses the simpler form.

Untuk here introduces a purpose:

untuk membersihkan teko = to clean the kettle / in order to clean the kettle

So the structure is:

• memakai spons lembut = use a soft sponge
• untuk membersihkan teko = to clean the kettle

Together: Dad uses a soft sponge to clean the kettle.

This is about Indonesian word formation.

• bersih = clean as an adjective
• membersihkan = to clean something, literally to make something clean
• bersihkan is often an imperative, like clean it!, or appears in certain constructions

So:

• teko itu bersih = the kettle is clean
• Ayah membersihkan teko = Dad cleans/is cleaning the kettle
• Bersihkan teko itu! = Clean that kettle!

In membersihkan, the root is bersih, and the affixes make it an active transitive verb.

Ada means there is/there are or to exist/be present.

So:

karena ada sedikit kerak = because there is a little scale/residue

This is a very natural Indonesian way to introduce the presence of something. It is like saying, because some residue is there.

Without ada, the sentence would feel less natural in this context. Ada helps present kerak as something present in the kettle.

Because sedikit before a noun means a little, a small amount of, or some.

So:

• sedikit kerak = a little residue / some scale

If you put sedikit after the noun, it usually does not work the same way and can sound unnatural here.

A good basic pattern is:

• sedikit + noun = a little + noun
• sedikit + adjective/verb can mean a little / slightly

For example:

• sedikit air = a little water
• sedikit panas = a little hot / slightly hot

So sedikit kerak is the normal choice.

Kerak means a crust, coating, or build-up that sticks to a surface.

In the context of a kettle, it usually refers to mineral deposit or scale, similar to limescale in English. So here it means there is a small amount of residue/build-up at the bottom of the kettle.

Depending on context, kerak can also refer to other kinds of crust or burnt residue, such as food stuck to a pan.

Literally, it is:

• di = at/on/in
• dasar = base, bottom
• -nya = its, the, or a context-based reference

So di dasarnya means at its bottom or more naturally at the bottom.

In this sentence, -nya refers to the kettle: the bottom of the kettle.

So:

ada sedikit kerak di dasarnya = there is a little scale at the bottom of it

Because dasar refers to the bottom/base surface of something, especially the inside or the lowest part of a container.

• dasar teko = the bottom/base of the kettle
• bawah teko usually means under the kettle or the underside of the kettle

So if the scale is inside the kettle, di dasarnya is the right choice.

Great question. Indonesian has two different di forms:

1. di as a preposition = written separately

   • di dapur = in the kitchen
   • di dasar = at the bottom

2. di- as a passive verb prefix = written together

   • dibersihkan = is cleaned
   • dipakai = is used

So in this sentence, di dapur and di dasarnya use the preposition di, which is why it is written separately.