If you want, and only if you want (some people advise against it, but I do it all the time) you could peel away a little dirt on the top to see if there's anything happening. How far down did you put the seeds? When I first started gardening years ago, that was my major problem. I planted seeds too deep. Now, I put seeds right into rapid rooters that have been soaked in pH'd water with a touch of superthrive and they sprout inside of 3-4 days. No paper towel or soaking or anything. 100% germ thus far over about 50 seeds. But I tend to break the middle of the rapid rooter so I can peek inside to see if they've sprouted. Since I remove and toss the plug anyways, I don't mind destroying it.