How to get clone samples?

Cloning starts at Monday and ends at Wednesday, within that period you can put in resources in your Clone Center to increase the percentage of the revived soldiers. All the resources are there but there will be one resource called Clone Sample. If you are able to fill in all the resources you will get a maximum of 30% revival rate of all your dead soldiers, you can only get to 100% (I think) if you have clone samples at your disposal. The first and last place I've seen a clone sample is that it is within those packages where you buy using real money. I have no clue on when they come out though. Hope this helps 😃

They are only sold in the store. I found they were not available during my first few weeks of gameplay. They are very expensive and not worth it. It requires the same amount of Rss as training from scratch plus $100's of dollars worth of gene fragments (clone samples)

Still working this one out but it seems that clone samples are only available to players who have lost troops, either over the past week or possibly only during the kill event. If you have lost troops you will have clone samples to use for yourself or donate to others.