The 2 hoses on the right hand side of the picture show evidence of very slight leakage so I reckon they’re the culprit.
I agree that the best course of action is a thorough clean/ degrease and then monitor the situation .
New clips and /fuel pipes should fix that, although there is a free way to fix it.
The clips are not that tight and you don’t need special tools to remove them.
Given the age of the car the clips might have dug deep into the ends of the existing hoses and that is now causing the weeping.
Depending on how much ‘give’ there is in the 2 right hand hoses you might get away with just taking clips off, cutting a centimetre or so of hose off carefully with a Stanley blade (giving you a ‘fresh’ bit of hose for the clips to work on) and then re-seating the hose and clips
That’s how I dealt with a very minor leak on one of my hoses once, it worked a treat.