justone

I just got a switch FS and have noticed some dust building up inside of the mask... the inside lense is kinda sticky almost so im having trouble cleaning it... the instructions say only to dab it with a cotton cloth and water... however this isn't cleaning it and is actually leaving cotton peices behind... what can i do to clean it that wont scratch it?

Also i was looking for a replacement lense but none of the lenses i saw said they were thermal. Does anyone know where to get a replacement thermal lense for the switch FS?