Walnut blasting? How many do it?

For those of you with DFI Audis, how many of you have walnut blasted the intakes and how often?

So my car is the iron block 5 cylinder, it is almost 10, and almost 30k miles. Every now and then I think I get a small hiccup under moderate acceleration (not hard or soft) but it has only happened a couple times and could be something I am doing with my foot and not realizing as well. Regardless, the car is mechanically very sound as far as I know and I take it in yearly for a go over.

With the age and engine should I just take it in for injector walnut blasting anyway? They say every 30k miles to do it and it should be under a grand from all I saw to do it.

What’s everyone’s experience with this.?