Lens Cleaning Fluid
In most camera stores you’ll find an alcohol based lens cleaning fluid that is well worth having. It will help you to lift off fingerprints and other smudges without leaving streaks on your lens or filter. Keep in mind that you don’t need too much of this fluid at a time – usually just a drop or two wiped in a gentle circular motion with a cleaning tissue will remove most marks on a lens or filter. Always apply the fluid to a cloth or tissue rather than the lens itself.
Alternatively – many photographers believe that simply breathing on your lens and then wiping with a cloth is a safer method for cleaning it – rather than introducing harsh fluids. My own approach is to start with breath and then use the fluids for difficult marks to remove.
To apply the cleaning fluid grab yourself some lens tissues. They are a very thin paper that will let you wipe your lenses without scratching them. These tissues are one use tissues and should be thrown away after using. Don’t use normal facial tissues – these are too rough and will scratch your lens.
An alternative to cleaning tissues is the more modern microfiber cleaning cloth. These washable cloths grab a hold of dust and oils on your lens. The main thing to be aware of with them is to keep them clean themselves with a regular wash – alternatively just buy yourself a new one as they are very cheap to buy and that’ll negate the risk of wiping something from your wash into your lens.
Before using a cloth always check the lens to make sure you don’t have any larger pieces of grit on it. The last thing you want to do is wipe it into your lens causing a scratch. Remove any larger gritty dust using a blower or brush before wiping.
Most camera stores sell blowers of different varieties. While I’d personally advise being very careful with them on the inside of your camera (you could actually end up blowing dust into it) they can be great for cleaning the outside of your camera – including the lens. Before you use a blower make sure you squeeze if a few times first to get any dust that might be inside it out.
If you have a lot of dust on your camera one good tool to get the big stuff off is a brush. Get one with fine and soft hair (camel hair) to avoid scratching your lens. Similarly you might like to invest in a lens cleaning pen which has a retractable brush on one end an a cleaning pad on the other.
One lost preventative measure before we end. Grab some silica gel sachets to throw into the bottom of your camera bag. The little sachets will draw any moisture in your bag to them to save your lenses and DSLR from being impacted by it. Keep changing over this sachets over time or they’ll attract too much water and become useless.