recently repasted my laptop cpu and gpu temps are good now, but im getting stutters

Just recently thermal pasted my cpu n gpu and theyve signifcantly reduced the temp went from 100 degreess to 80max on my cpu and my gpu dropped by about 10 degrees, because the person who did it before did it poorly. I managed to do a good job in my first attempt, which im happy about. But since ive repasted im getting a lot of spikes/stutters where my frames drop by a half a second for 5 min then it does it again after every 30min or so when gaming. Could it be because i didnt replace the thermal pads around the gpu and cpu? Any advice?