Hesitating warm starts `306

Hi, 95 306 DTurbo, cold starting is fine but if i take it for a run and try and start the engine whilst warm it will crank over roughly between 5-10 times, i have ran some decent fuel system cleaner through (BG 44K) to clean out the injectors, which i thought would solve the problem. It hasnt, what other common problems i should look for on poor warm starting? Thanks