Hi
@Viperpit07 and welcome to the ECF community.
There are several different reasons you might be experiencing flavor loss. Vaper's Tongue (the temporary loss of the ability to taste) is one (and what the previous suggestions are designed to help alleviate), over-flavoring is another, too much sweeteners like ethyl maltol (often abbreviated as EM, and also sold as "Cotton Candy" flavor) and sucralose are yet another, and dirty carbonized coils are still yet another, and under flavoring is possible too. Don't forget that vaping temperature can have an affect on taste as well.
Because you say you can taste your commercially prepared juice just fine and then switch to your DIY and instantly taste nothing, I am guessing that you can rule out vaper's tongue, as this is usually more of an all-or-nothing event.
The link to your recipe appears to have been removed (certain sites like ELR and VU are not permitted to be linked to on ECF and are automatically removed by the system. That's why you are seeing the "***************" string.). Would you please either take a screen sot of the recipe and post it (limited screen shots of recipes are usually permitted as long as they don't include headers or ULRs), or type out the recipe
as you mixed it (be sure to include
all ingredients and vendor names of flavors too), so we can get a better feel of the recipe that is giving you problems?
How are you mixing? Do you use syringes, measure by weight, count drops, just "eyeball" it, or something else? Are you using a recipe/mixing calculator, and if so, which one?
Have you had anyone else try this specific batch and did they taste anything? [Sorry, I just reread your original post, and now I'm uncertain if others have tasted
this specific batch, or just previous mixes you have made.]
I am guessing that over-flavoring is a more likely culprit; though too much sweetener and dirty coils can't be ruled out either (if your coils are gunked up, you might not be tasting a more lightly flavored DIY juice, but still taste a more heavily flavored commercial juice).
If you have a variable power device you might want to experiment (if you haven't already) with higher and lower temperature/power/wattage too. For reasons beyond my understanding; different recipes taste better/stronger/different at different temperatures.
Also, if it is over-flavoring, you could try cutting it. Mix up a small amount of unflavored (just VG, PG, and nic at your usual ratios) and then add it to your mix. I DO NOT RECOMMEND DOING THIS TO YOUR ENTIRE BATCH UNTIL YOU CONFIRM IT IS THE PROBLEM. Instead, take a small amount (say 2mL) and then cut with 1mL of unflavored(cut is 2:1). Shake and vape. Is it any better or still tasteless? If it is still tasteless (or starting to get a little taste but still very faint) then add another 1mL of unflavored (so now it is cut 1:1). shake and vape. Now how is it? Continue as needed or until you have reached a 5:1 dilution... I can't imagine that you would need to cut it beyond that to start perceiving flavor if it is indeed over-flavored.