Pretty much as Northwind, bare minimum of cleaning focuing on the moving parts, so the chain gets wiped and lubed most rides, but only degreased if it’s been wet/muddy enough to completely overwhelm it.
I do tend to give it a really thorough wash every couple of months. take the mech off, replace the inner cable and the last bit of outer*, degrease the chainrings properly. Then wash the rest of the bike, and give it a wipe with T-cut to remove stains.
Just got some Scotoiler UBS so will be trialing that over the summer.
*Yes yes I could spend £30 on Gore cables, but IME just replacing cheap teflon coated cables regualry works perfectly.