There will be very little - if any - lanolin in a scoured, processed, dyed wool such as is used to make a kilt - there could be some of the lubricant which was used in the spinning and winding process, but that would not be natural to a live sheep.

The gentlest washing agent would probably be human hair shampoo and conditioner - it is after all designed to remove Human skin exudates and keep our fibres smooth and swishy. It is recommended by those who spin by hand and do not have the benefit of the processes to make wool washable rather than feltable.

Anne the Pleater