Eczema Treatment Care

It’s really irritating me, and I can’t stop the itching. I just washed the area with soap. I applied Hydrogen Peroxide with a cotton swab. I did not touch the area with my hands.

I noticed my skin start turning dry, red, and extremely itchy. I found on the internet that it’s most likely atopic dermatitis aka eczema due to my allergens to tide/
a) how can i get rid of the excess detergent in my clothes, or do i throw them away..?
b) how can i treat the affected areas (under eyes, eyelids, neck, arms, legs, pretty much everywhere…)
HELP!