"Do you have anything cleaner?"

Translation: Avete qualcosa di più pulito?

[Viaggiatore]

It's masculine in expressions like qualcos'altro, something else.

[idwyers]

Why doesn't pulito need to agree with qualcosa? Or is qualcosa masculine?

[Biomax]

partitive complement is required to agree with"qualcosa" in masculine. example: "qualcosa di caldo" (something hot), or "qualcosa di pulito" (something clean).

[AlexBuxton]

Trying to work out what the difference actually is between hai and avete such as in this sentence (both were accepted

[Biomax]

"You have" can be translated as the singular "tu hai", the plural "voi avete" or the formal "Lei ha". Only context can tell you what to use.