I would leave it a couple days at the very least and then only put new paste on (even cheap stuff) if you think it's too hot after it's had time to set. The only time I mess with paste after putting a heatsink on is if the heatsink isn't working and your CPU is overheating. Your internal temperature at load is only 47 and that's far from what I would consider overheating.
The touch and smudge that you described earlier isn't something I would worry about either, the paste seems like it's doing it's job.
The touch and smudge that you described earlier isn't something I would worry about either, the paste seems like it's doing it's job.