Not Sealing

[Ethan]

I followed the instructional video on sealing, sealing at a diagonal first. However, the sealer isn’t melting the UMAI bag at all.

I tried sealing it about 4 times in the same spot without moving it, still the bag won’t seal.

I also tried the vac-seal process and still won’t seal.

I tested the bags that came with the sealer and it worked perfectly fine, so the sealer should be okay.