Yeah, that was the advice.... for a long time.
Cleaning thoughts...
You can shoot water at it to get the dust off with a turkey baster,
or roll around in some fresh treated water,
swish around in a loosely held hand to gently or gingerly rinse if needed.
I prefer in treated water or the top of
pwc water in a bucket. That way you do not kill and BB or aufwuchs living in it.
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New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?

Start here - Aquarium Advice Article
https://www.aquariumadvice.com/guide...ater-aquarium/
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves