Strang things spwitch back from ABS to PLA

[angryangel]

hi

i triede to print a prinhead assemblie of abs this failed because the abs dont stick to the bed now i decided to isolate the bed and i orderd isoltion material
and until this arrives i switch back to pla to print some smal things

and now after the switch back my prins are much better but i dont know why

until yet i always heard that it is a problem to switch between abs and PLA