After stupidly making horrible greasy finger marks on my Evostar ED72 I was mega annoyed with myself, I tried a cloth that came with an eyepiece and it just smudged it. After doing the usual Google panic I found Baader Optical Fluid recommend and it didn't disappoint I initially used some lens paper and then used the Baader Cloth and it genuinely was like new.
Now whether I'm brave/stupid enough to clean the inside of the lens is another question!

It cleans everything: finger prints, oil, you name it!

Great. My normal glasses have never been cleaner. Eyepieces and filters the same. Great product.

By far the best optics cleaning product I have ever used. Leaves no visible streaking and lifts finger marks like magic.

good soft cloth, so very unlikely to damage your optics unlike some of the cheaper ones. now have 3 sets, use for camera and scope

Purchased both to clean some eyepieces and binoculars. Works very well and leaves no trace. Best to spray some on the cloth and wipe rather than spray the lens as it collects in the corner and takes a while to evaporate. Leave the cloth out for a while to dry before folding an putting it back in the plastic bag.
Good Product

Really an excellent cleaning solution!

This is one of the finest I have used for optics cleaning!

The best cleaner for eyepieces by far and it brought up a lovely clean finish on my SCT corrector plate too.
Make sure you use an air blower to get bigger debris off first before you do any rubbing. And buy the Baader cloth too, it a great cloth which cleans up great when washed in some fairy liquid

I sent off for the Baader Wonder Fluid and cloth and it arrived the next day (First Light Optics, well done). A quick wipe and the glued on pollen fell away. Even more good news is that the hairline which I thought was a scratch lifted off too, so I'm left with a beautiful mint condition objective and a beautiful basically mint scope to go with it. Thanks all! It's not Wonder Fluid, it's Magic Fluid.