critterologist said:I've used mason twine in small pots, like for African violets. With larger containers, I like to add wicks made from 1" strips of micro-fiber towels, the "bar mop" type that I use instead of paper towels for a whole lot of things. I like Amazon's own brand the best -- good price, and they absorb water very nicely. Some of the other brands have a little trouble with initial dampening.
When I was raising a lot of AV babies, I kept them watered by putting a bunch of pots on top of a 1020 nursery flat full of water. Plastic light grids can be cut to size to fit over the reservoir tray. The grids are actually for ceiling lights, available at HD or Lowe's, as is the mason twine. You can cover the tray with a capillary mat (or a piece of old acrylic blanket) with an end sticking down into the water, then put pots on the mat. The mat stays wet, and the moisture is drawn up into the pots through the drainage holes. Or put mason twine wicks into individual pots, and dangle the wicks into the water reservoir through holes in the grid
With 2-part self-watering pots that aren't quite right (some flood the inner pot), I've put a wick down into the inner pot, over the rim, and down into the outer pot via the hole for adding water. These pots are often sold for African violets and are meant to work like wick watering, with the outer pot filled with water that slowly soaks through the unglazed inner pot.
If you put a few stones or a little gravel into a regular saucer (the dollar store oil-changing saucers make wonderful extra-deep plant saucers), you can raise the plant above the water reservoir. Now you have 2 things -- a wick to bottom-water your plant and a humidity tray to keep your plant happier inside in the winter.
I have old photos of some of this but can't currently access them. So instead I re-wrote my post and added more words, hopefully clarifying things a bit, although I realize a picture is worth a thousand words LOL.