leaving as it is
This structure indicates leaving something in its current state without change.
Examples
トマトをそのままにしておく。
I will leave the tomatoes as they are.
土をそのままにしてはいけません。
You should not leave the soil as it is.
道具を使ったままにしないでください。
Please do not leave the tools as they are.
Quick check
道具を使っ___ままにしないでください。