Jeg skrubber kjøkkenvasken med en oppvaskbørste før jeg skyller alt med varmt vann.

Norwegian often uses the definite form when you mean a specific, known thing in the situation—like the kitchen sink in your home.

• en kjøkkenvask = a (random/unspecified) kitchen sink
• kjøkkenvasken = the kitchen sink (the one we’re talking about)

skrubber is the present tense of å skrubbe (“to scrub”). Norwegian present tense is used for:

• habitual actions (“I scrub …” as a routine), and also
• actions happening now (“I’m scrubbing …”), depending on context.

Norwegian doesn’t form a present continuous with “to be” the way English does. The simple present (jeg skrubber) can cover both “I scrub” and “I’m scrubbing.” If you really want to emphasize “right now,” you can add something like nå (“now”), but it’s often unnecessary.

• med = “with,” used to mark the tool/instrument you use.
• en oppvaskbørste = “a dish brush,” with en as the indefinite article.

So med en oppvaskbørste literally means “with a dish brush.”

Yes—Norwegian commonly makes compound nouns as one word:

• oppvask = washing dishes
• børste = brush
  → oppvaskbørste = dish(-washing) brush

This is extremely common in Norwegian, so you’ll often see long nouns built this way.

Because vann (“water”) is a neuter noun (et vann historically/grammatically neuter), so the adjective takes the neuter form:

• varm (common gender: en/ei)
• varmt (neuter: et)
• varme (plural/definite)

So: varmt vann = “warm water.”

Yes. før here is a subordinating conjunction meaning before. It introduces a subordinate clause:

• før jeg skyller alt = “before I rinse everything”

In a subordinate clause, Norwegian keeps the normal subject–verb order (jeg skyller).

In standard written Norwegian, you normally put a comma before a subordinate clause:

• Jeg skrubber kjøkkenvasken med en oppvaskbørste, før jeg skyller alt med varmt vann.

In informal writing people often skip it, but the comma is recommended/standard.

alt is the neuter singular form meaning “everything” (as a general “all of it”):

• alt = everything / all of it
  alle is typically used with plural countable things (“everyone / all [people/things]”):
• alle = everyone / all (plural)

Here alt means “everything (that needs rinsing).”

Yes, it’s perfectly natural:

• med en oppvaskbørste = with a dish brush (tool)
• med varmt vann = with warm water (what you rinse using)

You could also sometimes see i varmt vann (“in warm water”), but that can suggest being in the water/container, while med focuses on the water as the means you use to rinse.

Yes—when a subordinate clause comes first, the main clause follows Norwegian V2 word order (the verb comes second), so you get inversion:

• Før jeg skyller alt med varmt vann, skrubber jeg kjøkkenvasken med en oppvaskbørste.
  Notice it becomes skrubber jeg (verb before subject) in the main clause.

A few common ones for English speakers:

• kj in kjøkkenvasken is often a “soft” sound in many dialects (can sound a bit like a hissy “sh,” depending on speaker).
• skyller has y, which is a front rounded vowel (not the same as English “i” or “u”).
• Double consonants often signal a shorter vowel: skrubber, kjøkken.