If I'm using acrylic ink, I will squirt a little windex into my water jar and then just dip the nib every few lines (and wipe it with a paper towel, usually the expensive ones that don't leave fibres
). Same if I'm using parallel pens that I'm dipping into the inks - it keeps them from clogging
Pointed nibs I'll water-dip and wipe on paper towel every so often. If it's gouache, a little more frequently, because it can build up; if it's walnut ink, much less frequently.
Windex is also magic at getting ink out of carpets, and clothes, if you've never tried