It seems as if we have this discussion
Over and over again. Living just under 2000m, I have no fear that sunlight around here actually is pretty effective at killing just about everything.
But, then, I wash in truly HOT water and regularly use either chlorine bleach or one of the cold water disinfectants.
Of course, I'm also one of those people who spray their keyboards and telephones with Lysol regularly.
99.9999999999% of getting rid of dangerous germs, though, is - as Laundress has pointed out here many times, cleaning the gunk and dirt off first. How the heck do you do that with useless cold water detergent and useless cold water washing?
Answer: You don't.
Someday (maybe soon) we'll have enzymes which actually clean in cold water - and cold water at our altitude for 10 months out of the year is below 2ºC - but until then, I'll take HOT water and STTP or TSP and a thorough soak at the optimal temperature for enzymes to work their magic.
Followed by line drying or a good tumble in the clothes dryer.
After thorough disinfection with chlorine bleach or cold-water disinfectant.
Oh, and just as in the spider discussions - being German not 'German-American' it would be well for the Europeans here to remember that other continents have different environmental conditions than do we in Central/Northern Europe and the UK. I'm very afraid of spiders and kill them on sight. Back home in Munich, I don't know how often friends and relations would say this represented unresolved psychological issues, blah-blah-blah. Yeah, right - we have one mildly unpleasant spider bite to worry about in Germany and two of the three most venomous spiders LIVE and THRIVE here in the good ol' USofA.
Ditto snakes.