Do the washing machine valves stiffen up? I find if they are not moved often they become useless.
I am currently watching my son build a PC... he is getting stressed because not everything fits perfectly! I am trying to explain to him that nothing ever does and that an onsite engineer's job is to adapt and overcome, rather than bleating about why this and that is shyte!
Yes, the valves could seize up if not exercised but it's better to be looking 'at them' than 'for them'!