I don't use a kit, but here's what I do. First of all, use a "blower" of the kind used for photography. Basically just a rubber bulb of
this kind I can't vouch for that particular one, but you get the idea. This is to puff any debris (especially gritty stuff like sand) off the lenses. It only takes a moment, and it's vital, because you can damage lenses by using a cleaning cloth and grinding abrasive debris against the glass.
Next, I use a lens brush, also of the kind used for cameras, to brush off any debris still remaining. Just insurance really.
Finally I use a microfibre cleaning cloth. I have one which was supplied with my Swaro bins, but it just needs to be decent quality. I also have a pair of mid-range Zeiss, and again a microfibre cloth came with the bins. I use the cloths interchangeably. I first breathe lightly on the glass surfaces so they mist up for a moment, and use the cleaning cloth before the mist has evaporated.
I've been using bins since 1979 and have never caused the slightest scratch on the lenses of any of them. Ditto camera lenses. I'm largely housebound now, but in the field used to see people - usually in the rain, in a hurry to wipe water off their lenses - pulling a handkerchief out of their pocket and scrubbing hard at them. I wouldn't!