question about medication?

I know I should be talking to a doctor but I have 2 questions about my meds. I have to take eye drops for pink eye I think the tip of my drops brushed against my top eye lid, how do I clean the tip? also my dose is for every 2 hours while Im awake, if I take a nap does that count? so If I take a nap at 1 but need to take the meds at 3, and end up waking up at 2:30, would I take them at 4:30 or 3 still?