I'm riding with Shimano SD66 sandals. They are awesome sandals and it's so comfortable riding without worrying about socks and shoes. I'm using Shimano pedals.
I'm getting a squeaking sound, mainly from one shoe/pedal at the top of the power stroke. I'm almost certain it's from the shoe/pedal because just adjusting the angle of my foot a little (inside the play allowed by the cleat/pedal) makes the noise stop.
I'm assuming that the shoe and pedal are deforming/conforming to each other and have started to rub at the most common positioning.
I'd normally look at lubricating, but don't want to use grease as that will track through my house and office.
Any other thoughts?