I’m finding it had to find the magic number. For example: I always use 4% (per oil amount, so 40g per 1kg of oils) for EOs blends with Lavender/Rosemary/Fir. 3% for oils such as mint/lemongrass and 2.5% for ylang ylang because I find it too sweet. Problem is the soaps fade quite quickly. I do use base notes to anchor them (cedar/patchouli etc), and clays too. Would you say these percentages are simply not high enough? What percentage are you using?