Hi C

How old are you inks? I think the shelf life is around 12 months for the cmyk inks. It does not sound like that is what is going on though. Have you tried maybe using a pretreatment for light color garments first? That might help, as I do use it for some light color stuff, and it definitely helps with brightness and better washing results. What temp and time are you using for your curing, and what are you covering the print with when you cure?