Necessary for degus TOP but replacement after about 4 months

I think my title says it all anyway. FYI: I 3 degus.
The impeller is top, Price fits (cheaper than retail), but as mentioned the exchange is due to urine (despite toy paint) absolutely necessary, since it is hygienically simply can not be expected to small rodents.
Who buys plastic, must have strong ears, who buys metal, has broken limbs at the little one. Therefore: Buy Bogie Wheel, and exchange repeatedly. A turntable is not true - at least, it may not necessarily mean.

Cleaning:
Clean with hot water and possibly Aloe Vera detergent (Attention, not too much chemical use !!) brings a life extension of Bogie Wheels because the urine then goes down, but the whole "eingedorrte" you do not get away anyway, despite strong rubbelns. -> Then allow to dry in the sun on the balcony in front of it and naturally dry it with kitchen roll.

Life Extension:
Toy paint with DIN number (google times or is in the specialized trade as Obi, etc.) -> often before first spray (approx 4x over 3-4 days of time) and then only giving the rodents ... thus the urine not dörrt as soon and cleanse it works better.

Lg and have fun