did you wash the fabric before using it? are you using PDF'S? (prepared for dying fabrics?) if you are using any other fabric you have to prepare it yourself by washing out the sizing and there is a product called bubble jet that is also used, available at places like Joannes and some quilt shops. once you have prepared your fabric and ran it through your printer it is important to set the pictures aside for at least 24 hours to 'cure' it gives the ink time to really saturate and set, then heat set it. i have done this step every day for a week before using the pictures and have had good luck with the colors staying vibrant. usually after a week of heat setting and just setting i rinse them in cold water i think you can use retayne also. it takes some practice before you really get it right, just like dyeing fabrics. but i think the curing/heat setting is very important, along with all sizing being removed from the fabrics.