iCloud Photo Duplicates

Dear Friends,
I have tones of duplicate of photos on all my Apple devices running iCloud.Its visually impossible to delete them one by ones as apple suggested because they are not spaced closely, some are not closed to one another.
i tried both Tidyup and photo cleaner to nor avail.Please help.

 

Thanks but I wouldn't want to loose the photos I am seeing now on all my devices, they are old pics taken several years ago. It happened to me once and I have to upload from Dropbox.

 

Problem is I am used to changing phones almost every year as well as the iPad and Mac itself, so most are actually taken with my older iPhones and the like. If I were to sign out of iCloud, I may see nothing on either device.

 

Let me explain more. When I first subscribed to iCloud, I lost all my pictures on the iPad which has all the pictures, the iPhone and Mac has almost nothing. Luckily enough I upload from Dropbox and got everything back after syncing through iCloud. Now if I do as you are saying?

 

Thanks very much dear Europa.I have done exactly as you said and i have exact same copies on all the devices but when i opened Photo application on the Mac i noticed it's trying to upload over 1,200 pictures again into the App and i quickly turned off iCloud Photo Library on all the devices pending your reply. I am afraid of having duplicates back on.

 

Or could this have something to do with the fact I have deleted MY RECENTLY DELETED FOLDERS on both the iPad and iPhone though I couldn't do same on iCloud photos on iCloud website?

 

Thanks very much dear Europa, you are indeed the best of the lot.

 

Now a new problem is appearing. The iCloud Photo Library is working wonderfully but for two days it's not syncing when I added new pictures on both the iPhone and iPad.