vitrex 560 cutter

[wall]

Hi
bought a new vitrex 560 cutter last week cutting porcelain tiles the cuts were very easy untill today I now have to push very hard to get the tile through and the cuts are now not straight. The blade has vitually not wore down from when I fisrt started using the cutter do I need to buy a new blade?

[garythetiler]

blade needs sharpening with a piece of sandstone

[wall]

Have just done a serch and it says that a peice of cement backer board will exposed new diamonsds?

[wall]

thanks gary
do you use the sandstone wet or dry