Dirty camera sensor

This is the result of a very dirty camera sensor;

I use Visibledust wet cleaning swabs to clean my camera sensors.  Suited for the removal of water based stains on your sensor. It provides an anti-static barrier for the prevention of dust accumulation, it has anti-fogging capabilities and prevents streaking as it cleans. If you intend to work in a humid or arid climate, Sensor Clean™ will provide a buffer against vapour build up and dust collection.