The "mitts" that I was using at that time are probably "PIXCO Universal Mini Softbox Flash Diffuser" and you can easily find a distributor online. However, I need to update my photo set ups. Nowadays, I replaced those "mitts" with "Mini Softbox Diffuser for Flash"; which probably produce similar results. Those search terms should lead you to the right product. I am always experimenting and now I would like to try the "Turtledove Diffusers for Canon MT-24 EX Twin Lite Flash" by Macroscopic Solutions, but I am afraid that these diffusers may not fit my flash unit.

Have you tried to reduce the flash power and increase your ISO settings? That might help reducing glare. Diffusing the flash light is essential to macrophotography. Alex Wild explains one of the simplest and effective methods of diffusing the light here.

Some good insect photographers can process a far-from-perfect image and turn it into a very good one using photo software. The most popular among macrophotographers, I believe, is Adobe Lightroom. What do you use to process your photos?

Good luck and happy bug hunting!

I have the plastic cap diffusers on the twin lights but they don't seem to spread the light the way I'd like. I've used the softbox diffuser for my speedlight and it works pretty good. Maybe I'll try something like this. The turtledove ones look interesting but I don't fully understand how they would work.

I will try reducing the flash and increasing the ISO. I haven't played with that. I've been focused on diffusing. I've used the plastic milk jug idea.

I'll keep playing. Thank you for sharing.

to mention that the material around the lens is a layer of vellum paper. It gets wrinkled with use, but this does not seem to affect the results.

The turtledove flash diffusers work by bouncing the light onto the semicircular structures on the side that in turn shine light onto the subject, but I have not tried them yet. I've seen better results with "bounced light" than with light that goes through a material (vellum paper, plastic, Styrofoam, etc) to diffuse it.

I may have to try out those turtledove diffusers! I've been using the "light goes thru material" method and haven't found anything I'm super happy with. I'm not good at "hacks" for photo stuff either. When I use the Stackshot, I can bounce under a box. But for other shooting, the specimen isn't mounted so I can get the underside photo'd. It's difficult to get the box over it without moving it.

I've tried studio lighting as fill light. I used this marginally successfully. At present I have milk carton deflector taped to the twin light diffusers. These hang to the top of the table. My creativity wanes when I feel like all I'm doing is adding diffuser on top of diffuser with no real difference.

I like seeing and trying different aspects of macro lighting techniques but it's more helpful to talk about it.