What is the most logical next event?

How to clean a speck fabshell iphone case
Remove your device from the case
Get a toothbrush.
Get a toothbrush, preferably a toothbrush that is old and not used anymore.
Get a small amount of liquid detergent.

Options:
a). In a separate container, turn your device upside down. Use a soft rag to place down tiny dabs of the detergent on all parts of the case.
b). Warning: do not use bleach. Bleach may cause the colors to fade away.
c). You will need it to start cleaning the screenshots. Squirt some liquid detergent on a small, clean cloth and wipe the sides of the case.
d). For rough cleanings you could use a liquid detergent like free-form dish detergent, but this is better. Wipe or scrub the inside of the case with the toothbrush.
b).