Counting on the heat and UVs to do their worst.
That’s probably a very good idea — AFAIK, the heat is very effective at reducing the not-quite-alive-span of the virus.
The UVs probably help too — but, windows block a lot of UV. Also, you’re only getting UV-A or UV-B from sunlight — the ozone layer completely blocks UV-C. Sunlight is the best disinfectant, as the old saying goes — but, you need UV-C to completely sterilize things.