fabric has to be pre-washed- with detergent, no fabric softener before printing- to remove the sizing/chemicals so the inks can saturate the fibers- either bubble jet set or soda ash will work- and purchase good quality permenent ink cartridges- don't use the lesser expensive-off brand, refillable cartridges- those inks are meant to wash out.
let the ink *cure* - i generally give it at least 24 hours- then heat set-
if using the transfers- with time they do (fade or crack) just like a t-shirt with iron on transfers---to avoid that it is best to not launder it often- fold the transfers in before putting into wash (t-shirts they tell you to turn inside out before washing) and always use cold water - a low heat dry---they will last a long time if they are treated (gently and correctly- so will printed fabric)