I've never made a standard invisible deck, but have made a Khardova Deck and a Jumbo McCombical Deck. The key to success is patience - it takes several "treatments" to get it right. If you are interested, try taping or covering the top and bottom quarters of the cards and then applying the "treatment" only to the middle. It takes less "stuff" and is less detectable.
Try this for fun... arrange the invisible deck like a regular deck of cards. Have a spectator pick a card from a spread. Turn the spread face up and have them put their face down card in the spread. Square the deck, turn it over and spread the face down cards. Their card has disappeared from the deck. Have them name their card and then reveal it using a regular invisible deck. Or peek / force the card and you can reveal it in the second deck without having them name it. Also, you can force the card and have it reappear anywhere you want.
Perception of reality is a selection of reality which results in a distortion of reality.