I use the Wee Willey Kit from Rider wearhouse . It costs 17 $ and comes in a handy zip pouch. It includes an integrated spray bottle/squeegee and a sponge and polishing cloth , it works great. According to the advertisement it " will not scratch hardened shields".
They also sell refills and the cleaning cloth seperatly.
Mac
They also sell refills and the cleaning cloth seperatly.
Mac