"For ticks that can be seen (adult ticks), freeze the tick to kill it where it is"
"For ticks that can hardly be seen – use permethrin cream to kill the tick where it is"
You can buy tick freezing spray, which is used in a similar way to wart freezing spray.
[1] https://www.health.gov.au/sites/default/files/2022-11/manage...
Edit: Here is the research on which the medical advice is based. Dated 2019 by Australian researchers, so the updated practise might not be widely deployed outside Australia.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6494660/
Edit: A comprehensive resource on tick treatment, including justification for the freezing advice.
https://www.health.gov.au/sites/default/files/2023-01/preven...
Edit: and finally, the ABC Catalyst video segment demonstrating the technique.