In a big mixing bowl, beat 3 eggs with a whisk ntil all the white and yellows are fully mixed. Incorporate all the wet ingredients gradually, starting with the coconut milk. Add and mix in 4 batches.
Slowly add the pandan juice in the same manner, in 4 batches, whisking all the contents in a gentle manner.
Add the dry ingredients (plain, corn and glutinous flour, sugar, salt, baking soda) using a sieve in a dusting manner in small batches. Make sure a batch is well incorporated before adding another batch. This helps to prevent clumps in the batter. Keep mixing the batter to work some of the gluten, but don't beat air into the batter.
The batter should have the consistency likened to dripping honey, and not as thin as agave or maple syrup streams. Add flour or water in 1/2 tbsp increments to tweak the batter if you need to.
If you have clumps showing up, you may have to pass the batter through a sieve to remove them. The crepes batter can't have clumps.