We keep receiving inquiries about Swiffer wipes, which are allegedly toxic to pets. What's behind it?
Even though the post is old, many users are still concerned about the well-being of their pets, which is completely understandable!
There is so much crap circulating on social networks that it is sometimes difficult to keep track of things - especially when old things are constantly being rehashed, like this claim:

ATTENTION TO ALL PET OWNERS! URGENT READ AND SHARE!!!
As we
found out on the bulletin board during a visit to the vet's office almost a week ago, a 5-year-old German Shepherd had to be euthanized because of a painful liver disease. The owner ordered an autopsy because she had no explanation for this condition. The previous history is necessary We know that the dog always lived in the house, was only taken outside under supervision and was always supervised there. The autopsy showed that the liver was in a terrible condition, which could only be attributed to regular ingestion of poison. Afterwards, all household products were checked for toxic components. Upon closer inspection of the packaging of “SWIFFERS – wet wipes” one came across the small print, which states that the product is toxic to children and animals. Contacting the manufacturer of the product resulted in this big surprise that one of the components is de-icer, or very close to the molecule de-icer. The German Shepherd's owner's floor was cleaned regularly with the above-mentioned cloths. The dog always licked its footpads and that led to poisoning. Not long after the dog's death, 2 cats with the same symptoms also had to be euthanized. In this case too, the “SWIFFER – moist wipes” were used there for a long time. Pet owners are expressly warned not to use these wipes, which are toxic to animals. Please pass this on to all friends, acquaintances, etc. with children and pets!!!!
The fact check
As you can hardly tell from the date, this is an older post.
Swiffer himself already commented in 2011 and wrote:
Swiffer wet wipes (Swiffer Wet) are safe for people and animals.
We repeatedly receive reports that the use of Swiffer wipes leads to harm to pets. We would like to point out that this is just a rumor that is being spread over the internet.
The safety of Swiffer wipes for use in households with pets has been extensively studied and scientifically and veterinarily confirmed by independent experts.
Swiffer wipes are safe to use in households with pets. It does not contain any ingredients that are harmful to humans or pets. The main ingredient in Swiffer wet wipes is water. The cleaning substances contained are used in conventional cleaning products worldwide and are present in a concentration that is safe and harmless for humans and pets. However, as with all cleaning products, Swiffer wipes are recommended to be stored out of the reach of children and pets. However, if the product is used in an inadvisable manner (e.g. licking the floor treated with Swiffer cloths), there is no risk of harm to health. Only the bitter taste can temporarily cause nausea. This can be counteracted by drinking water afterwards.
Dr.
rer. nat. Matthias Zierhut Procter & Gamble Service GmbH
Technical External Relations
Schwalbach am TaunusHeidemarie Koch
Procter & Gamble Austria GmbH
Technical External Relations
Vienna

But the claim has been around for much longer. This hoax first appeared in France in 2009 and then made it to German-speaking countries.
This is what it said:
Re: Wet Swiffer wipes: Dangerous for dogs and cats!!!
Recently, one of my neighbors had to put down her 5 year old German Shepherd due to a painful liver condition.
The dog was in perfect health until a few weeks ago. For this reason, the owner requested an autopsy. The liver was in a terrible condition, which was due to ingestion of poison. We immediately followed this trail - because the dog always lived in the house and was only accompanied outside. Finally the owner went to search the apartment and checked all household products for toxic content. When “inspecting” the packaging of the “Swiffer wet wipes” more closely, he came across the small print: A warning: That this product can be toxic to children and animals. Contact was made with the manufacturer to find out to what extent this cleaning product is dangerous for children and animals. Big surprise when they replied that one of the ingredients is de-icer (in reality very close to the molecule de-icer) Result, the bottom of the The apartment was regularly cleaned with these cloths, the dog licked his footpads and ate from the pot that was on the cleaned floor and that made him sick. Not long after the dog's death, the homeowner's tenant had to euthanize her two cats because of the same thing. Landlords and tenants both used the “Swiffer” wet wipes. The tenant chose not to perform an autopsy and cannot claim any damages. She asks us to spread this information to warn other pet owners. [*Editor’s translation]
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