MacBook Pro 16" Thermal Throttling Very Easily and Dust

Hello,

lately I see my MacBook Pro 16" (with i9-9880H and 5500m) thermal throttling very easily, at least, more than usual. Fans are always at full blast.

I see a lot of dust around the fans openings and I was thinking that a good cleaning would help.

But I was wondering, is cleaning included in warranty? If I do it by myself instead, so opening the back plate, cleaning the fans and closing it again, will I lose the warranty? I bought it in Jan 2020, but in Italy we should have 2 years warranty.

Thanks in advance for any clarification!