For the stuffy nose, you could try a bulb asperator. If any of your neighbours have young children, they might even have one. Is a rubber bulb about 2/3's as big as the bulb on a turkey baster with a removable plastic nozel at the end. You compress the bulb in your fist, place the nozel gently against a nostril and let go the pressure on the bulb. The suction clears away the snot and mucus. I used this method very successfully on my daughter when she was a baby and I would have used it on my cats, if they had ever needed it. It may not work with this little guy because he doesn't know/trust you yet, but if you think he'll sit still for it, its worth a try.
If you're green, you're growing...if you're ripe, you're rotting!
I try to greet the world like my pets do...boundless enthusiasm, intense curiosity and no concept of yesterday and tomorrow.