Razer Strider Chroma

The plastic on the eletric part is extreamly brittle, and the glue is failing, I have not used any harsh chemicals, I washed it 2 times with andrex baby whipes

Return it, get replacement.

They would replace it?

How do I return it @FiszPL 

Depends on your location and the store where did you bought this (alsop their policy).

For eg. in EU you can return item up to 14 days (if bought online). Just contact the shop / seller and describe the problem.

I got it on amazon January 14, also the glue that failed got on my desk and destroyed the paint