Review on Detachable Anti Explosion Anti Clogging REGALMIX RWF083H by Josh Koa

I bought 2 of these in March 2019 and was planning to install them the first week of May. Installation was easy, but within a few weeks of installing I noticed that they were starting to rust. I was about to write this review, so the photo I've attached was taken a few days ago (about 10 weeks after I installed it). The other one isn't as bad, but it's showing signs of rust, so I guess it won't be long before it looks as bad as this one. I would guess that the rust is going into the drain pipe as well. For $20 I think you get what you pay for and based on the positive reviews I may not have been lucky enough to get 2 from a bad batch although I have also read reviews mentioning rusting issues were, so what, who knows. I may buy 2 replacements again as they are holding up but a little disappointed that they will look like this in 10 weeks.