How can I further prevent pink eye?

My son was first diagnosed with it. Now my other two have it. We are doing the eye drops. We are doing the basic stuff, washing hands, no contact, anything that touches the eye is getting thrown away like tissues. I've washed all towels with bleach. I read that I should disinfect the countertops, door knobs etc. But should I also wash their pillow cases? Disinfect toys? Will that matter?