Wash your garment (including tote bags) inside out in a cool temperature.
Wash white coloured shirts together; don’t mix them with other coloured shirts. Avoid washing jeans or harsher fabric with printed t-shirts. Harsher fabrics like denim may cause prints to peel when rubbed with softer fabric or prints during washing.
Regular/milder detergent is enough to make your t-shirts clean and fresh. The use of bleach or strong detergents like softeners will damage prints.
Never put the garments (including tote bags) in the tumbler dryer.
Never iron directly on t-shirt prints. Lower the temperature settings of the iron, and turn the t-shirt inside out before ironing.