It’s been a little over a year since I got my Rainy75 mechanical keyboard in the yellow variant, and I’ve honestly enjoyed using it a lot. The typing experience is smooth, it looks cute on my desk, and overall, it’s been reliable for both work and gaming.

But recently, I noticed something strange: tiny bumps forming on the back of the case. At first, I thought it might’ve been dust or something I could wipe off, but a closer look showed that the electrophoretic coating was starting to lift, creating little raised spots under the surface.

I bought this keyboard from a reseller on Lazada, but I decided to reach out directly to Wobkey, the brand behind Rainy75, just to ask if this was something they had seen before and if anything could be done (i.e. replacement).

To my surprise, they replied quite promptly and explained that while their warranty only covers six months, the bumps I noticed were likely due to high humidity levels. Living in Singapore, humidity is something I’m used to, but I didn’t expect it to affect a keyboard’s coating this way.

It’s Still Working… But Will It Get Worse?

Aside from the bumps on the back, everything else still works really well. The keyboard sounds great, feels comfortable to type on, and still connects without issues. The rgb is also having no issues. So for now, I just really hope the peeling doesn’t spread or worsen over time.

It’s a bit disappointing, though, because even if the Rainy75 is considered “budget-friendly” within the custom keyboard community, I still paid over S$100 for it. That’s not exactly cheap in my book. At that price point, I expected better quality control, or at least some guidance if the product is sensitive to environmental conditions like humidity.

If humidity plays such a big role in the durability of the coating, it would’ve been helpful if Wobkey had clearly stated the ideal storage conditions or offered care tips. Especially since this keyboard is shipped internationally to many humid countries.

Is This Just Me? Apparently Not.

I decided to do a little digging and came across several Reddit posts and discussions from other Rainy75 users who noticed similar issues. Some had the coating flake off near areas they touched often, while others noticed paint chipping on the case after a few months of use.

“The paint scrapes off after some time…”
“The coating came off where my hands usually rest.”
“This shouldn’t happen after normal use.”
(source | source)

It seems like this might not be limited to the yellow version as it’s been reported on several colorways. That makes me wonder if it’s a broader issue with how the coating reacts to certain climates or conditions.

What Would You Do?

At the end of the day, the issue is on the back of the keyboard (for now), so it’s not something I see often. But knowing that it’s there does bother me a little, especially after just one year of light usage.

I’m going to continue using the Rainy75 for now and see how it holds up over time. I might even steer away from E-Coating on mechanical keyboards if this is going to be an issue.

Have you had something like this happen to your keyboard, or any other tech product? This is the first time I have encountered such an issue just one year in.

Would you reach out to the brand too? Try to fix it? Or just live with it? I’d love to hear your thoughts so do let me know in the comments below!

Final Thoughts

I still like the Rainy75 for what it offers: a solid build, a clean design, and a great typing feel. But if you're considering getting one and you live in a humid environment, it might be worth thinking about looking into alternatives with more durable coatings and giving this a miss.

A year later, it’s still typing strong, but the few small bumps have definitely left an impression (and not in a good way).