I recommend Citrus bar of soap. they do not like the smells of citrus which includes lemon, lime, grapefruit ,tangerine, lemongrass and wild orange .
It will not kill them, it will make them avoid places where they can stay.
Always purchase real handmade soap with real essential oils and not
All Natural Soap -South African Grapefruit with Brazilian Clay and
Tangerine Butter 7 .oz by Natural Handcrafted Soap
This means it will help limit bacterial or microbial growth on the skin.
It can help ward off skin infections as well as lessen skin issues caused by
bacterial infections, such as folliculitis and cellulitis.