Activity answer:

Detail a step-by-step guide for the activity of taking out/cleaning her contact lenses green tick
Provide visual or audio cues to remind Joan to remove her contact lenses at the end of the day green tick
De-clutter the bathroom to minimise the products that Joan has to choose from green tick
If Joan agrees, ask other family members to prompt her green tick

Practice the activity frequently (repetition)

green tick
Clearly label the contact lens solution green tick