I bought a mini pro Lenspen from one of the shops at peninsular plaza for $8. I think it's the smaller version of the lenspen. The shop is along the same row as cathay photo.
I'm using lens tissue right now coz it seems after 2 weeks of use with the cleaning tip during my australia trip, when i try to clean the lens now, it's doesn't seem to be as efficient and effective. Maybe i'm not using it properly, but it's just some feedback on my experience with it.