Okay, I installed the stans no-tubes on my Easton XC one wheelset. I used Specialized 2-bliss tires. During install it took quite a while to seal the sidewalls of the tires (not the beads, I had no leaks at the beads at all). I finally got it sealed and had no leaks. I only used one scoop of sealant. The tires held air fine for about 3 days, now they are starting to lose pressure. Is this normal? Do I really have to re-seal them this often? How long should I be able to go without adding more sealant or going through the sealing procedure (all the tire shaking).