First, I would not bath in a tub with any amount of Lysol in it!
Katie-are you sure it is chigger bites and not poison oak, sumac, or ivy? Also, their are wood mites which do burrow under your skin. You have to see a Dr. for those and get meds. My DH had them everywhere a few years ago. He was in misery. Had to put special cream on all over everywhere for a week.
I use a paste of baking soda and a little water, place on the bites and rest. The paste dries, is messy, but helps take the sting away and pulls out the poison. The vinegar works too. Here's a pic of three 'bites' I got two weeks ago. Itched like crazy, swelled my leg from the poison, and finally are 'drying' up after three soda treatments.
Left calf chigger bites two weeks later.
[ATTACH=CONFIG]82796[/ATTACH]