what do you want to clean? I use windolene on everything extertrnal while it is switched off. I turn the keyboard over and give it a good shake, then use windolene on a cotton bud to get the gronk out between the keys
I love windowlene! It's brill. If you wanted a computer cleaning product (i.e. at my work we have little sachet wipes for our screens etc) then a stationers may be the answer (Rymans)?