A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate only showed baseline spots. What change could be made to get the spot(s) to move further up the plate?
-Spot a new plate and run again in the same solvent system
-Spot a new plate and run in neat hexane
-Spot a new plate and run in 1:2 ethyl acetate/hexane
-Spot a new plate and run in 2:1 ethyl acetate/hexane