Pec*Pads are lint-free non-abrasive wipes for cleaning critical surfaces without scratching when used with an appropriate solvent. Although not tested for use with the low pass filters, these use a fairly tough glass similar to those for which they are designed. I'm not aware of anyone managing to cause damage using them, and they are fine for lens-cleaning also. They come in packs of 100 squares, each 10x10cm and a pack costs around 7 USD.
Photographic Solutions who make PecPads as well as the SensorSwab digital imaging chip cleaners strong advise against using PecPads for cleaning your CCD chips. However this is not borne out by the experience of many photographers who have made use of them for the purpose. It would be more helpful if they were to sell wipes of the material they use in their swabs rather than simply be negative in this way. Currently there is no evidence available that PecPads can harm CCDs when used following the online instructions for cleaning.