Can soda crystals damage the washing machine drum?
I’ve always advised that soda crystals are good at dissolving grease and can be used to help clean out a gunged up washing machine or more importantly help prevent a build up of grease (see pic). Last time I used some I noticed that on the back of the packet they should not be used on aluminium. I instantly thought about the alloy drum spiders inside washing machines and wondered whether soda crystals could cause any damage.
I sent an e-mail to a manufacturer of soda crystals who told me that there shouldn’t be anything to worry about. The only reason they advise against using the crystals on aluminium is that it can cause pitting, which would be undesirable on anything on show. Therefore as no one can see the drum spider it’s not a problem. I doubt they could undermine the strength or stability of something made of aluminium, just cause small pitting.