We all know that we should pull apart, rinse & lubricate our foils after every session. But I don't.

But I always rinse over foil & board with a container of freshwater.
I know the painful & frustrating experience of having to try & loosen seized bolts! Sometimes even having to try & drill out bolts that have had their heads snapped off. And I don't intend on doing this to my foil!

So usually after a few continuous sessions Over a weekend or roster days I will pull my foil apart, rinse & lubricate with white lithium grease spray it stays white for a while & doesn't blacken like WD 40 & other oil.
A good warning that lets me know when my foil needs maintenance is when I hear a clicking or cracking noise when the bolts are tightened & or loosened. It means the lubrication has run dry & may have dirt or sand deposits.
When I hear this I will never tighten the bolts any further as it tells me the bolt has bitten into the mating surface & may need more force to undo. This usually doesn't happen when the bolts are newly lubricated I am then more confident in tightening the bolts fully.