Use fresh sprouts from a trusted source; rinse well; eat the same day when possible.
If you blanch sprouts (1 minute boiling, then ice bath), dry thoroughly before dressing.
For lunchboxes, keep dressing separate or add mango at the last minute so it does not weep.
Oil-free: omit oil and use a tablespoon of water to help spices cling.
Leftovers are best the same day; refresh with lemon and herbs if needed.