Yes re washing dogs’ paws, it is advised in a few countries.
There is no official published guidance as regards cleaning for prevention. Because there is not enough real conclusive public scientific analysis or testing let alone proper research. Because everything is so new.
A lot of advice is based on what is known about viruses of similar format and general strict hygiene rules.
Under current circumstances, we are piecing together the bits of info we collect along the way.
It is safe to say, if we do nothing else, we should view Warm soapy water as the holy water for now (not drink it obviously).
We know human skin is a (one of?) vehicle of transmission.
We don’t know enough about other surfaces yet but we should be extra cautious nonetheless. So we don’t know if rubber can pick the virus up and deposit it somewhere else. We don’t know if hair is a viable survival surface, we don’t know much. So we have to assume everything we touch with contaminated bare hands can become contaminated and remain so for some time.
Wash hands, don’t touch face - this message is clear enough.
Clean the bloody phone phone all the bloody time - surely this must be one of the biggest contributing factor based on what we know about transmission.
Coughing, sneezing, spitting, talking, laughing, shouting, singing - all release droplets which can contain active viruses. Again, let’s be over cautious. 2m is not enough.
I can’t remember who asked but based on what has been vehiculated,, there is no evidence to suggest that once the contaminated droplets fall to the ground, they get lifted back into the air by the wind. The water droplets that carry the virus will evaporate, the virus will remain inert on the ground and eventually it’s outer shell will deteriorate from UV light. We don’t know if it can be collected by shoes or paws whilst still active and then moved to a new surface like floor in the house. Theoretically, it can’t fall off the sole of a shoe (if it even gets there in the first place) and the contact between the sole and floor surface is not 100% so I don’t see how something that small can transfer through pressure alone. Unless the shoe picks up a blob of something that contains active viruses and then it deposits this on the kitchen floor and a toddler eats it. Not impossible but not a daily occurrence to be enough to account for the speed of the current spread.
It’s minimal knowledge, minimal advice, we don’t know and nobody knows enough to give clear advice.