[John Kelly]

Both Shift and Spray N Go have an indefinite shelf life as long as they are both kept dry.  However, the manufacturers state that they will remain active for 2 years, again as long as the lid is firmly shut, allowing no moisture to be absorbed. 

So when using it, take out what you need and replace the lid immediately.

[Doug Holloway]

Hi Guys

Sodium Met is a reducing agent and works by 'grabbing' oxygen.

Obviously a sealed container will only contain x amount of oxygen so when this is used up no more oxidation will occur.

Everytime you open iy you add more oxygen, so it will gradualy lose it's potency.

Cheers

Doug

[oliver collins]

Hi

I use sod Mets for coffee and red wine,

However i normal use liquied high heat as my shampoo so i have to leave the stains to the end change to clean water and then flush out in case it causes futher bleaching am i correct in my cleaning methord or am i being overly careful

Oliver Collins

[Jim_77]

I very much doubt that the very slight acidity left behind by Liquid High Heat would have any bearing on the use of sod. met.

Have you even tested the pH of a carpet you've just cleaned using that as a rinse?  Even with a pH-neutral pre-spray, unless you're grossly over-using the product, I'd be surprised if it read very far over the acid side at all, to be honest!