Uso el quitamanchas durante el prelavado.

Uso is the first-person singular present tense of usar, meaning I use.

So:

• uso = I use
• usas = you use
• usa = he/she/you (formal) uses

In this sentence, uso el quitamanchas means I use the stain remover.

Spanish often drops subject pronouns when the verb already makes the subject clear.

Because uso clearly means I use, there is no need to say yo uso unless the speaker wants emphasis or contrast.

For example:

• Uso el quitamanchas. = I use the stain remover.
• Yo uso el quitamanchas, no el detergente. = I use the stain remover, not the detergent.

So the sentence sounds natural without yo.

It can often mean either, depending on context.

In Spanish, the simple present is used more broadly than in English. So uso can mean:

• I use it (habit/routine)
• I’m using it (right now), if the context makes that clear

In this sentence, it most naturally sounds like a habit or usual practice: I use the stain remover during the prewash.

If you wanted to strongly emphasize an action happening right now, Spanish might use estoy usando:

• Estoy usando el quitamanchas durante el prelavado.

But the original sentence is completely natural.

Quitamanchas literally breaks down as:

• quita = removes
• manchas = stains

So the literal idea is stain-remover or something that removes stains.

This is a very common kind of compound noun in Spanish, where a verb form plus a noun creates the name of an object.

Because quitamanchas is a singular noun, even though its form ends in -s.

The -s is part of the word itself, not a plural ending here. Spanish has several compound nouns like this. The article tells you whether it is singular or plural:

• el quitamanchas = the stain remover
• los quitamanchas = the stain removers

So you should think of quitamanchas as one fixed noun.

Spanish uses articles more often than English.

Here, el quitamanchas can mean:

• a specific stain remover already known in context, or
• the stain remover as the product being used in this situation

English sometimes drops the in places where Spanish prefers to keep the article.

So uso el quitamanchas sounds natural and complete. In some contexts, you might also hear uso quitamanchas, especially in shorter, more label-like or general statements, but uso el quitamanchas is very normal.

Durante means during.

It introduces a time period or stage in which something happens. So:

• durante el prelavado = during the prewash

It answers the question when? or at what stage?

Yes, in many contexts you could, but the nuance is slightly different.

• durante el prelavado emphasizes during that stage / over that period of time
• en el prelavado means in the prewash stage/cycle

In practice, both can work, but durante focuses more clearly on timing.

So the original sentence is a good choice if the idea is I use it during the prewash phase.

Because Spanish only contracts el with:

• a + el = al
• de + el = del

But durante + el does not contract.

So:

• durante el prelavado is correct
• durantel is not a word

Prelavado means prewash or pre-wash cycle/stage.

It refers to the washing step that happens before the main wash. It is formed from:

• pre- = before
• lavado = wash / washing

So el prelavado is the prewash stage.

Because prelavado is a masculine noun.

Its base noun is lavado, which is masculine, so the compound stays masculine:

• el lavado
• el prelavado

That is why the sentence says durante el prelavado.

The original word order is very natural:

• Uso el quitamanchas durante el prelavado.

But Spanish word order is somewhat flexible. For example, you could also say:

• Durante el prelavado, uso el quitamanchas.

This version puts more emphasis on when the action happens.

Both are correct. The original sentence is just the most neutral, straightforward order.

Yes. Usar is completely correct, but depending on context, a native speaker might also say:

• aplico el quitamanchas = I apply the stain remover
• echo el quitamanchas = I put/add the stain remover

The difference is:

• usar = general, broad: to use
• aplicar = more specifically to apply
• echar = more colloquial, often to pour/add/put in

So uso el quitamanchas durante el prelavado is natural, but it is not the only possible way to say it.