This is the 5390th most frequent Russian word.
очистке
"Очистке" means "purification" or "cleaning" in English, depending on context.
In this sentence, 'очисткой' refers to the act of cleaning or removing dirt and debris, indicating a physical cleaning process.
Я занимался очисткой бассейна от листьев.
I was cleaning the pool from leaves.
Here, 'очистки' implies a chemical or specialized process for maintenance and hygiene purposes.
Средство для очистки систем кондиционирования воздуха.
A product for cleaning air conditioning systems.
This usage of 'очисткой' refers to purifying or treating, often with reference to making something cleaner or more suitable.