Wondering should a blister be exposed to the air to let it dry out. Does it heal faster? Well, at best, it's inconsequential. At worst, it delays healing.
Days, weeks, longer? How long does it really take for blisters to heal? Here's a photographic timeline of my last blister showing it took a bit over 6 weeks.
That white gel bubble demonstrates hydrocolloid healing. The weepiness of your blister is combining with the dressing to form a perfect healing environment.