the lazer only indicates where the gun is pointed, it does not affect the reading or accuracy in any way, do you know the d/s ratio of your gun?, if not, then you cant tell what you are measuring regardless of the quality or d/s ratio of your gun. heat guns are great for some things but terrible at things like a cage environment.
your gun projects a cone of ir energy, at the end of that cone is a circle, the size of that circle is determined by the distance at which it is used, in combination with the d/s ratio. everything that can be seen in that circle is being measured and averaged, this includes your cham, your branches, even the screen or glass of your cage, it likely even includes readings from outside your cage. its measuring everything it sees and averaging it out.
ir temp guns only measure reflected ir energy of solid surface objects. air is not a solid surface object and does not reflect ir energy, therefore when you use a ir temp gun regardless of cost or quality or d/s ratio, you are measuring everything except the air, which is the thing you need to measure most.
if you dont know your d/s ratio or understand what it is, you can not accurately use your temp gun, even if you do , your temp gun does not measure air temp, it only averages the temp readings of all solid surface objects that can be seen within the circle of your d/s ratio.
waxworms are almost 1/4 fat, more fat than protein, combined with an astronomically high phosphorus ratio, imo make them one of the worst offering for any cham but especially a montane.
phoenix worms (or bsfl) are one of the best things you can feed your cham (in moderation). they contain high levels of lauric acid, which is believed to discourage many pathogens, including coccidia. that being said, its important to keep in mind that no single feeder should make up more than 40% of the overall diet and cricks arent a good choice for that.
also, even though they are a nutritionally balanced feeder, bsfl have a tough rubbery outer skin that is hard to digest. a common practice is to nip each one in the side with a pair of nail clippers, so that the digestive juices of your cham have a place to get started on. jmo