Daytona Fuel Tanks

I have not found a thread on cleaning the residue out of a Daytona's fuel tanks.
Ours look pretty clean except for a light dried residue on the bottoms; they are out of the car.
I am looking for any recommendations on a product we can use to flush out them out.
Thanks in advance for any help here.

 

Thanks for the response. I hope to start experimenting this week. My tanks are Al and it will be some time before they are reinstalled so drying should be no problem. I have used a reversed vacuum hose in the past for this type of drying situation.

 

Update: loaded both tanks with a shot of simple Green; poured in a gallon of hot water; agitated the tank; and found that ten minuets later, on the tank with access, it was easy to rag wipe the layer of softened scum out. Sorry to say there was little you can do with the other tank because the two small 'ports' are baffled and there is no way to get inside to wipe things down. I settled for two SG applications; assuming anything likely to come loose will have dome so.
We will count on multiple filter changes once we are gassed up.

 

Thanks; I'll do just that.

 

I plan to chase some down. Thank you.