Injecting - Swims got sold base coke as regular how to IV

[BumpBump]

Swim scored some coke last weekend and it was in a lump. 1g of it.
Swim tried to IV but it just turned into oil, then when in the syringe it turned solid again and blocked the syringe. and loads had become solid round the filter.
So swim smoked some on his pipe and yeh it melted and gave swim a mild crack hit. Swim had a line and it was ok too!
Swim was a bity pissed as he didnt manage to get a good hit of hit IV.
Swim did it with citirc but it didnt make much difference. So how do people IV crack then when it just goes solid when cools? swim cant seem to make it a salt again.