I've seen people use aloe or yucca, or you can buy a comercially available wetting agent. It reduces the surface tension of the water, in escense making water wetter. It can help when your soil gets hydrophobic from getting too dry. You could also try watering slower, bottom watering, or sticking a skewer into the pot a few dozen times to make new pathways for the water. How much water is your 3g pot taking before runoff?Honestly, I don't even know what a wetting agent is. I guess I haven't added it.... lol.