Just buy another brand for less. They went so far as to Photoshop ‘enhance’ my warranty photos to increase contrast to support their claim, and they admit it.
My very expensive Tempur / Tempurpedic mattress is cracking all over on top after 8 years, and my wife can’t sleep in it. Tempur quickly voided the warranty claim saying it’s water damaged - after they ‘enhanced’ a single image, mostly highlighting shadows.
I think the memory foam bed is actually only good for 4-5 years depending how big you are and you local humidity. The warranty at 10 years is a total scam for anyone but tiny fairies living in a plastic bubbles. If they said “this lasts 5 year’s” sales would crater or cheap alternatives would win out. Instead they say ‘full 10 year warranty’ but Don’t honor it.
There is no water damage on my bed. Some slight soiling on the mattress cover where you lay (8 years, not washable) plus some shadows due to the window, and they say stained and water damage no warranty. ‘Enhanced’ my photo to make it look worse. Wouldn’t even look at additional photos or send someone out.
IMHO everyone should invest in waterproof mattress barriers. Being waterproof, they prevent all the night sweat and body oils from soaking in and degrading the mattress faster (which is a legit issue that contributes to the body valley), but it also makes them dirt and bedbug proof. And if you put it under a mattress pad, you won’t even know it’s there. They aren’t like the thick noisy plastic of days gone by. If it’s directly under sheets you might hear it, but they are not particularly loud.
They are also dirt cheap; the last one I bought was $13 for a queen size, and as long as it doesn’t tear, it’ll last basically forever. It rarely even needs to be washed. Small price to pay to keep my mattress a bit nicer a bit longer, even though it won’t make it last forever. :)