The paradox of meditation is that the desire for certain mental states often acts as a hindrance preventing that state from arising. To get that experience again , you need to drop that desire.
I remember reading an a book long ago that a Chinese chan master who lived in the previous century, put some potatoes into a pot to prepare them for boiling. Then he went to meditate for what he thought was a short period. When he came out of meditation, and checked the pot, he found that it was dry and the potatoes had sprouted.