If it makes any difference it was 'The' place most of us go to get these cars mapped.
I was surprised to read what they said to be honest...
I might have guessed it was them
Did they say how long they ran cleaner through a set of injectors, and at what concentration? What brand of cleaner? You know....just for corroborating evidence
What else could be a contributing factor here, I wonder.
300ml of cleaner diluted into 55000ml of fuel is a whopping 0.55% cleaner to fuel ratio.
V Power has 5% concentration of Ethanol in it. Could be cheap corn based stuff of varying strength, it could be consistent high end stuff, who knows. Ditto Momentum.
95 unleaded has 10% concentration.
What is an injector basket? It's a metal filter with either a rubber, plastic or metal locating sleeve.
Which fluid is well known to damage rubber over time? Ethanol.
Which two things are well known to degrade plastic over time? Fossil based fluids and heat cycling.
I don't know what brand of cleaner specifically they're referring to, but anyone in doubt could just drop Liqui-moly an email and ask them about it. Pretty sure a company of their size and reputation will have done their due diligence on chemical analysis.