Lice help?

[toast]

Hiya,
Unfortunately I'm back with more (different) skin issues. I noticed some tiny white worm-looking things moving in my guineas fur - I think they're lice, but will get them checked by a vet to be sure and get treatment for them.
I have noticed them scratching a bit, but no scabs/flakiness/hair loss.
Do you have any tips for dealing with them, or any idea where they may have come from?
My guineas are indoor only in a C&C, and I keep them on fleece. They get Oxbow brand hay. I'm really confused about where they may have come from.
If I wash the fleece at 90° would it be enough to kill them, or do I need to throw all of it out?
What can I use on the actual cage bottom that will kill the lice?

 

[Piggies&buns]

This guide will help New guinea pigs: Sexing, vet checks&customer rights, URI, ringworm and parasites
let us know how you get on at the vet

 

[toast]

This guide will help New guinea pigs: Sexing, vet checks&customer rights, URI, ringworm and parasites
let us know how you get on at the vet

Vet recommended using the Xeno spot on treatments, and that I should be fine with washing the fleece at high temps. Overall said to just deep clean everything very well and repeat the Xeno treatments.

 

[Claire W]

I hope the Xeno treatment helps and that your piggies will soon be lice free.

I would also get rid of your current hay bag if you haven’t already in case the lice have come in on the hay

 

[toast]

I hope the Xeno treatment helps and that your piggies will soon be lice free.

I would also get rid of your current hay bag if you haven’t already in case the lice have come in on the hay

I did get rid of my bag, and I'm ordering some extra ones ahead of time so I can quarantine new bags before feeding. Thanks for the tip!