Hi there,
Yes definitely try to get a better means of measuring temps. I prefer digital with probe ends over IR thermometers. They are less finicky.
But, you need to do that to really know what your temperatures are. Temperatures are extremely important. And i've tested dial gauges that were off by 20-40 degrees. So you really are just guessing with them.
Luckily, the digital with probe ends can be picked up from any petstore or online for less than 10 bucks. A worthwhile investment.
-Brandon