>>8708129
Can you post a meltie example? Along with your metadata or at least upscaling setting. So we don't have to guess blindly at what you're doing wrong.

The first step is to not use Latent upscaler, or shitty pixel-space ones such as nearest-exact or bicubic. Grab something like https://huggingface.co/Kim2091/AnimeSharpV3
Then keep your denoise low, usually in the 0.2-0.4 range.