I like Beequip's information page with instructions.
I never used their cardboard strip or anything similar, however I will have an observation.
I remember Phill saying the same thing too about drying the strips/staples just like on beequip's guide. They say to remeove excess solution from the strips by firmly wiping them over the rim of a crate, pail or a hive box(as per Phill).
This method was not so successfull for me.
I found the best method to dry the strips/staples over night so they will not longer be greasy(the bees like them this way or I think this way their feet are not affected by the solution).
Also letting the staples to dry(I hang them over some wooden bars) they will still hold more solution compared to wiping them(I do not think this is a major concern), however when they are dry and the crystals show on the surface that is what we all want to achieve,
