Airobot devices are designed and built to be very durable. We've rigorously tested the devices in harsh conditions and are confident in their quality. Nevertheless, these are machines that operate 24/7 to ensure clean air. To be honest, on very rare occasions, there may be engine or hardware failures in Airobot devices.
If this happens, we respond very quickly and with full seriousness. We always keep a small amount of spare parts in stock and organize repairs very quickly.