I booked a solar panel cleaning. He came on time, very friendly. Panels are much cleaner now than when I do them with my Kaercher. I saw a 12% increase in electricity production next day, remains to be seen, how long will the effect last. Nice chap.

Very professional and reliable window cleaner.Well organized and trustful.Highly recommended.

Karlin is reliable and conscientious .

I have used him more than once and he has always done a brilliant job of cleaning all our windows .

I am happy to recommend him!

We used Kostov Cleaning to sort out our windows for our new built house.

They were very dirty after the construction had over.

He made them like new!

Great job Kal.

Highly recommended ! He is the one you can trust as no much experienced window cleaners in the area of Polis!

Is the best service!!!My family we recommend🙌🏻Professional cleaning!!!!