Why is omicron more infectious? Smaller, stickier particles?

[megletthesecond]

Is it lighter in the air or does it need fewer particles to infect? Or don't we know yet?

Not an epidemiologist obviously .

It is better at initially evading the immune system, and penetrating human cells to use them to replicate.

Oh there was something in the DF yesterday. I have no idea whether it is accurate but here you go … www.dailymail.co.uk/news/article-10316131/Is-Omicron-spreading-rapidly.html

Apparently it multiplies seventy times faster than delta in bronchial tissue, which I think means it can be coughed out more readily, but slower in lung tissue, meaning it's slightly milder in its effect.
www.theguardian.com/world/2021/dec/15/omicron-found-to-grow-70-times-faster-than-delta-in-bronchial-tissue