So, I'd been looking at my driveway and patio for a while, and man, they were looking pretty grim. Years of dirt, some green stuff growing in the corners – you know how it is. Just using the standard wand on my Karcher pressure washer was taking ages, and honestly, I was getting more water and muck on myself and the windows than on the actual dirt I was trying to shift.

Getting the Gear

I decided enough was enough and picked up the Karcher T15 surface cleaner attachment. Heard a few folks talking about these surface cleaner things, figured I'd give it a shot. When it arrived, I pulled it out of the box. Seemed pretty straightforward, a big round disc thing with bristles around the edge and the spray nozzles underneath. Didn't feel flimsy, which was a good start.

Hooking It Up

Connecting it to my pressure washer lance was super easy. It just sort of clicked into place on the extension lance that came with it, and then that clicked onto my spray gun. No tools, no fiddling about for ages, which I always appreciate. I was ready to go in like, two minutes.

The First Blast-Off

I started on a section of the patio that was particularly nasty. Took a deep breath, squeezed the trigger, and the T15 whirred to life. It sort of hovers a tiny bit, and you just guide it along. My first thought was, "Hey, this is way easier than the wand!"

I moved it in slow, overlapping passes, kind of like mowing a lawn. It was pretty satisfying watching the dirt just disappear underneath it. The bristles around the edge did a decent job of stopping most of the dirty water from spraying everywhere. Big plus, that. I wasn't getting soaked, and the house walls weren't getting a fresh coat of grime.

How It Went

Here’s a quick rundown of what I found:

• Speed: Definitely faster. I reckon I covered the patio in less than half the time it would have taken with just a narrow jet.
• Effort: Much less arm ache. You're just guiding it, not fighting the force of a jet.
• Cleanliness (of me): I stayed way drier and cleaner. A few splashes on my boots, but nothing like the usual shower.
• Evenness: It gives a much more even clean. No more accidental zebra stripes that you get if you're not super careful with a wand.

Now, it wasn't a complete magic wand for the really, really caked-on bits or those deep green patches in the grouting. For those, I found I still had to go over them a bit slower, or even give them a quick blast with the dirt blaster nozzle afterwards just to finish them off properly. The T15 is great for the bulk of the work, the main surface area.

I did the whole driveway too. Same story. Moved along nicely, cleaned consistently. For edges right up against a wall or a raised flower bed, you still gotta be a bit careful, or maybe use the wand for that last inch, because the round shape means it can't get super tight into 90-degree corners. But that's a minor thing, really.

My Two Cents

After spending the afternoon with it, I gotta say, the Karcher T15 surface cleaner is a good bit of kit. It made a job I usually dread a whole lot more bearable, and quicker too. My back was thanking me, and the patio and driveway look a million times better.

If you've got a Karcher pressure washer and decent-sized flat areas to clean – patios, driveways, maybe even some decking – I'd say it's worth considering. It's not going to deep clean every single crevice to perfection on its own if things are really bad, but for the main surface cleaning, it's a winner in my book. Made the whole process far less of a chore.