I got pioneer sx-700t and I just want to fix it
** ROTFL !!
I use a paintbrush and a blower.
** Waaayyy too messy to do indoors.
So I use a vacuum cleaner and 1 inch paintbrush in a similar way.
Massively clogged amps with internal fans get done out on my balcony.
Diabolical cases ( ie filthy fans) get a bath in the sink with hot water and detergent. Then dried in the oven at low temp - I kid you not.