The Magic Eraser and a dry brush is probably all the stylus cleaner you'll ever need, for next to no money. It's kept hundreds of cartridges as clean as new for over two years. Read the instructions Rushton linked to carefully, it's important to brush afterwards, just like eating! ;-)
AIVS makes a one-step cleaner that works pretty well. It's not as effective as their multi-step cleaners but it's way better than just dry brushing.
Vacuuming after wet cleaning is pretty important, otherwise you're just dissolving dirt and shoving it around. The least expensive purpose built machine is sold by KAB. It attaches to your existing household vacuum. DIY machines can be made for even less, though they're a bit slower to use. Do a search and you'll find hundreds of posts.
AIVS makes a one-step cleaner that works pretty well. It's not as effective as their multi-step cleaners but it's way better than just dry brushing.
Vacuuming after wet cleaning is pretty important, otherwise you're just dissolving dirt and shoving it around. The least expensive purpose built machine is sold by KAB. It attaches to your existing household vacuum. DIY machines can be made for even less, though they're a bit slower to use. Do a search and you'll find hundreds of posts.